Add update() API to kv_db

Fix eviction when random_pos selects the end
Implement min/max list_count to make listings during performance test reasonable
2024-01-06 17:14:42 +03:00 · 2024-01-02 13:24:15 +03:00 · 2024-01-02 13:24:15 +03:00 · 2024-01-02 13:24:15 +03:00 · 2024-01-02 13:24:15 +03:00 · 2024-01-02 13:24:15 +03:00
140 changed files with 3903 additions and 2599 deletions
@@ -395,7 +395,7 @@ jobs:
    steps:
    - name: Run test
      id: test
-      timeout-minutes: 6
+      timeout-minutes: 3
      run: SCHEME=ec /root/vitastor/tests/test_snapshot_chain.sh
    - name: Print logs
      if: always() && steps.test.outcome == 'failure'
@@ -532,24 +532,6 @@ jobs:
          echo ""
        done

-  test_switch_primary:
-    runs-on: ubuntu-latest
-    needs: build
-    container: ${{env.TEST_IMAGE}}:${{github.sha}}
-    steps:
-    - name: Run test
-      id: test
-      timeout-minutes: 3
-      run: /root/vitastor/tests/test_switch_primary.sh
-    - name: Print logs
-      if: always() && steps.test.outcome == 'failure'
-      run: |
-        for i in /root/vitastor/testdata/*.log /root/vitastor/testdata/*.txt; do
-          echo "-------- $i --------"
-          cat $i
-          echo ""
-        done
-
  test_write:
    runs-on: ubuntu-latest
    needs: build
@@ -39,10 +39,6 @@ for my $line (<>)
                $test_name .= '_'.lc($1).'_'.$2;
            }
        }
-        if ($test_name eq 'test_snapshot_chain_ec')
-        {
-            $timeout = 6;
-        }
        $line =~ s!\./test_!/root/vitastor/tests/test_!;
        # Gitea CI doesn't support artifacts yet, lol
        #- name: Upload results
@@ -38,7 +38,7 @@ in the offer.
        on behalf of third parties, including on behalf of his employer.

 2. Subject of the Agreement. \
-   2.1. Subject of the Agreement shall be the Contributions sent to the Author by Contributors. \
+   2.1. Subject of the Agreement shall be the Contributions sent to the Author by Contributors.
   2.2. The Contributor grants to the Author the right to use Contributions at his own
        discretion and without any necessity to get a prior approval from Contributor or
        any other third party in any way, under a simple (non-exclusive), royalty-free,
@@ -86,7 +86,7 @@ in the offer.
        of their provision to the Author. \
   5.2. The Contributor represents and warrants that he legally owns exclusive
        intellectual property rights to the Contributions. \
-   5.3. The Contributor represents and warrants that any further use of
+   5.3. The Contributor represents and warrants that any further use of \
        Contributions by the Author as provided by Contributor under the terms
        of the Agreement does not infringe on intellectual and other rights and
        legitimate interests of third parties. \
@@ -2,6 +2,6 @@ cmake_minimum_required(VERSION 2.8.12)

 project(vitastor)

-set(VERSION "1.4.8")
+set(VERSION "1.3.1")

 add_subdirectory(src)
@@ -1,4 +1,4 @@
-VERSION ?= v1.4.8
+VERSION ?= v1.3.1

 all: build push

@@ -49,7 +49,7 @@ spec:
            capabilities:
              add: ["SYS_ADMIN"]
            allowPrivilegeEscalation: true
-          image: vitalif/vitastor-csi:v1.4.8
+          image: vitalif/vitastor-csi:v1.3.1
          args:
            - "--node=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
@@ -121,7 +121,7 @@ spec:
            privileged: true
            capabilities:
              add: ["SYS_ADMIN"]
-          image: vitalif/vitastor-csi:v1.4.8
+          image: vitalif/vitastor-csi:v1.3.1
          args:
            - "--node=$(NODE_ID)"
            - "--endpoint=$(CSI_ENDPOINT)"
@@ -5,7 +5,7 @@ package vitastor

 const (
    vitastorCSIDriverName    = "csi.vitastor.io"
-    vitastorCSIDriverVersion = "1.4.8"
+    vitastorCSIDriverVersion = "1.3.1"
 )

 // Config struct fills the parameters of request or user input
@@ -188,6 +188,7 @@ func (ns *NodeServer) unmapNbd(devicePath string)

 func findByPidFile(pidFile string) (*os.Process, error)
 {
+    klog.Infof("killing process with PID from file %s", pidFile)
    pidBuf, err := os.ReadFile(pidFile)
    if (err != nil)
    {
@@ -208,7 +209,6 @@ func findByPidFile(pidFile string) (*os.Process, error)

 func killByPidFile(pidFile string) error
 {
-    klog.Infof("killing process with PID from file %s", pidFile)
    proc, err := findByPidFile(pidFile)
    if (err != nil)
    {
@@ -3,5 +3,5 @@
 cat < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build --build-arg DISTRO=debian --build-arg REL=bookworm -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build --build-arg REL=bookworm -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile
@@ -3,5 +3,5 @@
 cat < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build --build-arg DISTRO=debian --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile
@@ -3,5 +3,5 @@
 cat < vitastor.Dockerfile > ../Dockerfile
 cd ..
 mkdir -p packages
-sudo podman build --build-arg DISTRO=debian --build-arg REL=buster -v `pwd`/packages:/root/packages -f Dockerfile .
+sudo podman build --build-arg REL=buster -v `pwd`/packages:/root/packages -f Dockerfile .
 rm Dockerfile
@@ -1,7 +0,0 @@
-#!/bin/bash
-
-cat < vitastor.Dockerfile > ../Dockerfile
-cd ..
-mkdir -p packages
-sudo podman build --build-arg DISTRO=ubuntu --build-arg REL=jammy -v `pwd`/packages:/root/packages -f Dockerfile .
-rm Dockerfile
@@ -1,4 +1,4 @@
-vitastor (1.4.8-1) unstable; urgency=medium
+vitastor (1.3.1-1) unstable; urgency=medium

  * Bugfixes

@@ -1,14 +1,13 @@
 # Build patched libvirt for Debian Buster or Bullseye/Sid inside a container
-# cd ..; podman build --build-arg DISTRO=debian --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/libvirt.Dockerfile .
+# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/libvirt.Dockerfile .

-ARG DISTRO=
 ARG REL=
-FROM $DISTRO:$REL
+FROM debian:$REL
 ARG REL=

 WORKDIR /root

-RUN if ([ "${DISTRO}" = "debian" ]) && ( [ "${REL}" = "buster" -o "${REL}" = "bullseye" ] ); then \
+RUN if [ "$REL" = "buster" -o "$REL" = "bullseye" ]; then \
        echo "deb http://deb.debian.org/debian $REL-backports main" >> /etc/apt/sources.list; \
        echo >> /etc/apt/preferences; \
        echo 'Package: *' >> /etc/apt/preferences; \
@@ -24,7 +23,7 @@ RUN apt-get -y build-dep libvirt0
 RUN apt-get -y install libglusterfs-dev
 RUN apt-get --download-only source libvirt

-ADD patches/libvirt-5.0-vitastor.diff patches/libvirt-7.0-vitastor.diff patches/libvirt-7.5-vitastor.diff patches/libvirt-7.6-vitastor.diff patches/libvirt-8.0-vitastor.diff /root
+ADD patches/libvirt-5.0-vitastor.diff patches/libvirt-7.0-vitastor.diff patches/libvirt-7.5-vitastor.diff patches/libvirt-7.6-vitastor.diff /root
 RUN set -e; \
    mkdir -p /root/packages/libvirt-$REL; \
    rm -rf /root/packages/libvirt-$REL/*; \
@@ -1,10 +1,8 @@
 # Build Vitastor packages for Debian inside a container
-# cd ..; podman build --build-arg DISTRO=debian --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/vitastor.Dockerfile .
+# cd ..; podman build --build-arg REL=bullseye -v `pwd`/packages:/root/packages -f debian/vitastor.Dockerfile .

-ARG DISTRO=debian
 ARG REL=
-FROM $DISTRO:$REL
-ARG DISTRO=debian
+FROM debian:$REL
 ARG REL=

 WORKDIR /root
@@ -37,8 +35,8 @@ RUN set -e -x; \
    mkdir -p /root/packages/vitastor-$REL; \
    rm -rf /root/packages/vitastor-$REL/*; \
    cd /root/packages/vitastor-$REL; \
-    cp -r /root/vitastor vitastor-1.4.8; \
-    cd vitastor-1.4.8; \
+    cp -r /root/vitastor vitastor-1.3.1; \
+    cd vitastor-1.3.1; \
    ln -s /root/fio-build/fio-*/ ./fio; \
    FIO=$(head -n1 fio/debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    ls /usr/include/linux/raw.h || cp ./debian/raw.h /usr/include/linux/raw.h; \
@@ -51,8 +49,8 @@ RUN set -e -x; \
    rm -rf a b; \
    echo "dep:fio=$FIO" > debian/fio_version; \
    cd /root/packages/vitastor-$REL; \
-    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_1.4.8.orig.tar.xz vitastor-1.4.8; \
-    cd vitastor-1.4.8; \
+    tar --sort=name --mtime='2020-01-01' --owner=0 --group=0 --exclude=debian -cJf vitastor_1.3.1.orig.tar.xz vitastor-1.3.1; \
+    cd vitastor-1.3.1; \
    V=$(head -n1 debian/changelog | perl -pe 's/^.*\((.*?)\).*$/$1/'); \
    DEBFULLNAME="Vitaliy Filippov <vitalif@yourcmc.ru>" dch -D $REL -v "$V""$REL" "Rebuild for $REL"; \
    DEB_BUILD_OPTIONS=nocheck dpkg-buildpackage --jobs=auto -sa; \
@@ -9,8 +9,6 @@
 These parameters apply only to Vitastor clients (QEMU, fio, NBD and so on) and
 affect their interaction with the cluster.

- [client_retry_interval](#client_retry_interval)
- [client_eio_retry_interval](#client_eio_retry_interval)
 - [client_max_dirty_bytes](#client_max_dirty_bytes)
 - [client_max_dirty_ops](#client_max_dirty_ops)
 - [client_enable_writeback](#client_enable_writeback)
@@ -21,26 +19,6 @@ affect their interaction with the cluster.
 - [nbd_max_devices](#nbd_max_devices)
 - [nbd_max_part](#nbd_max_part)

-## client_retry_interval
-
- Type: milliseconds
- Default: 50
- Minimum: 10
- Can be changed online: yes
-
-Retry time for I/O requests failed due to inactive PGs or network
-connectivity errors.
-
-## client_eio_retry_interval
-
- Type: milliseconds
- Default: 1000
- Can be changed online: yes
-
-Retry time for I/O requests failed due to data corruption or unfinished
-EC object deletions (has_incomplete PG state). 0 disables such retries
-and clients are not blocked and just get EIO error code instead.
-
 ## client_max_dirty_bytes

 - Type: integer
@@ -9,8 +9,6 @@
 Данные параметры применяются только к клиентам Vitastor (QEMU, fio, NBD и т.п.) и
 затрагивают логику их работы с кластером.

- [client_retry_interval](#client_retry_interval)
- [client_eio_retry_interval](#client_eio_retry_interval)
 - [client_max_dirty_bytes](#client_max_dirty_bytes)
 - [client_max_dirty_ops](#client_max_dirty_ops)
 - [client_enable_writeback](#client_enable_writeback)
@@ -21,27 +19,6 @@
 - [nbd_max_devices](#nbd_max_devices)
 - [nbd_max_part](#nbd_max_part)

-## client_retry_interval
-
- Тип: миллисекунды
- Значение по умолчанию: 50
- Минимальное значение: 10
- Можно менять на лету: да
-
-Время повтора запросов ввода-вывода, неудачных из-за неактивных PG или
-ошибок сети.
-
-## client_eio_retry_interval
-
- Тип: миллисекунды
- Значение по умолчанию: 1000
- Можно менять на лету: да
-
-Время повтора запросов ввода-вывода, неудачных из-за повреждения данных
-или незавершённых удалений EC-объектов (состояния PG has_incomplete).
-0 отключает повторы таких запросов и клиенты не блокируются, а вместо
-этого просто получают код ошибки EIO.
-
 ## client_max_dirty_bytes

 - Тип: целое число
@@ -19,8 +19,8 @@ These parameters only apply to Monitors.
 ## etcd_mon_ttl

 - Type: seconds
- Default: 1
- Minimum: 5
+- Default: 30
+- Minimum: 10

 Monitor etcd lease refresh interval in seconds

@@ -19,8 +19,8 @@
 ## etcd_mon_ttl

 - Тип: секунды
- Значение по умолчанию: 1
- Минимальное значение: 5
+- Значение по умолчанию: 30
+- Минимальное значение: 10

 Интервал обновления etcd резервации (lease) монитором

@@ -25,6 +25,7 @@ between clients, OSDs and etcd.
 - [peer_connect_timeout](#peer_connect_timeout)
 - [osd_idle_timeout](#osd_idle_timeout)
 - [osd_ping_timeout](#osd_ping_timeout)
+- [up_wait_retry_interval](#up_wait_retry_interval)
 - [max_etcd_attempts](#max_etcd_attempts)
 - [etcd_quick_timeout](#etcd_quick_timeout)
 - [etcd_slow_timeout](#etcd_slow_timeout)
@@ -211,6 +212,17 @@ Maximum time to wait for OSD keepalive responses. If an OSD doesn't respond
 within this time, the connection to it is dropped and a reconnection attempt
 is scheduled.

+## up_wait_retry_interval
+
+- Type: milliseconds
+- Default: 500
+- Minimum: 50
+- Can be changed online: yes
+
+OSDs respond to clients with a special error code when they receive I/O
+requests for a PG that's not synchronized and started. This parameter sets
+the time for the clients to wait before re-attempting such I/O requests.
+
 ## max_etcd_attempts

 - Type: integer
@@ -25,6 +25,7 @@
 - [peer_connect_timeout](#peer_connect_timeout)
 - [osd_idle_timeout](#osd_idle_timeout)
 - [osd_ping_timeout](#osd_ping_timeout)
+- [up_wait_retry_interval](#up_wait_retry_interval)
 - [max_etcd_attempts](#max_etcd_attempts)
 - [etcd_quick_timeout](#etcd_quick_timeout)
 - [etcd_slow_timeout](#etcd_slow_timeout)
@@ -220,6 +221,19 @@ OSD в любом случае согласовывают реальное зн
 Если OSD не отвечает за это время, соединение отключается и производится
 повторная попытка соединения.

+## up_wait_retry_interval
+
+- Тип: миллисекунды
+- Значение по умолчанию: 500
+- Минимальное значение: 50
+- Можно менять на лету: да
+
+Когда OSD получают от клиентов запросы ввода-вывода, относящиеся к не
+поднятым на данный момент на них PG, либо к PG в процессе синхронизации,
+они отвечают клиентам специальным кодом ошибки, означающим, что клиент
+должен некоторое время подождать перед повторением запроса. Именно это время
+ожидания задаёт данный параметр.
+
 ## max_etcd_attempts

 - Тип: целое число
@@ -59,7 +59,6 @@ them, even without restarting by updating configuration in etcd.
 - [recovery_tune_client_util_high](#recovery_tune_client_util_high)
 - [recovery_tune_agg_interval](#recovery_tune_agg_interval)
 - [recovery_tune_sleep_min_us](#recovery_tune_sleep_min_us)
- [recovery_tune_sleep_cutoff_us](#recovery_tune_sleep_cutoff_us)

 ## etcd_report_interval

@@ -605,14 +604,5 @@ is usually fine.
 - Default: 10
 - Can be changed online: yes

-Minimum possible value for auto-tuned recovery_sleep_us. Lower values
-are changed to 0.
-
-## recovery_tune_sleep_cutoff_us
-
- Type: microseconds
- Default: 10000000
- Can be changed online: yes
-
-Maximum possible value for auto-tuned recovery_sleep_us. Higher values
-are treated as outliers and ignored in aggregation.
+Minimum possible value for auto-tuned recovery_sleep_us. Values lower
+than this value are changed to 0.
@@ -60,7 +60,6 @@
 - [recovery_tune_client_util_high](#recovery_tune_client_util_high)
 - [recovery_tune_agg_interval](#recovery_tune_agg_interval)
 - [recovery_tune_sleep_min_us](#recovery_tune_sleep_min_us)
- [recovery_tune_sleep_cutoff_us](#recovery_tune_sleep_cutoff_us)

 ## etcd_report_interval

@@ -635,14 +634,4 @@ EC (кодов коррекции ошибок) с более, чем 1 диск
 - Можно менять на лету: да

 Минимальное возможное значение авто-подстроенного recovery_sleep_us.
-Меньшие значения заменяются на 0.
-
-## recovery_tune_sleep_cutoff_us
-
- Тип: микросекунды
- Значение по умолчанию: 10000000
- Можно менять на лету: да
-
-Максимальное возможное значение авто-подстроенного recovery_sleep_us.
-Большие значения считаются случайными выбросами и игнорируются в
-усреднении.
+Значения ниже данного заменяются на 0.
@@ -154,9 +154,6 @@ That is, if it becomes impossible to place PG data on at least (pg_minsize)
 OSDs, PG is deactivated for both read and write. So you know that a fresh
 write always goes to at least (pg_minsize) OSDs (disks).

-That is, pg_size minus pg_minsize sets the number of disk failures to tolerate
-without temporary downtime (for [osd_out_time](monitor.en.md#osd_out_time)).
-
 FIXME: pg_minsize behaviour may be changed in the future to only make PGs
 read-only instead of deactivating them.

@@ -157,10 +157,6 @@
 OSD, PG деактивируется на чтение и запись. Иными словами, всегда известно,
 что новые блоки данных всегда записываются как минимум на pg_minsize дисков.

-По сути, разница pg_size и pg_minsize задаёт число отказов дисков, которые пул
-может пережить без временной (на [osd_out_time](monitor.ru.md#osd_out_time))
-остановки обслуживания.
-
 FIXME: Поведение pg_minsize может быть изменено в будущем с полной деактивации
 PG на перевод их в режим только для чтения.

@@ -1,27 +1,3 @@
- name: client_retry_interval
-  type: ms
-  min: 10
-  default: 50
-  online: true
-  info: |
-    Retry time for I/O requests failed due to inactive PGs or network
-    connectivity errors.
-  info_ru: |
-    Время повтора запросов ввода-вывода, неудачных из-за неактивных PG или
-    ошибок сети.
- name: client_eio_retry_interval
-  type: ms
-  default: 1000
-  online: true
-  info: |
-    Retry time for I/O requests failed due to data corruption or unfinished
-    EC object deletions (has_incomplete PG state). 0 disables such retries
-    and clients are not blocked and just get EIO error code instead.
-  info_ru: |
-    Время повтора запросов ввода-вывода, неудачных из-за повреждения данных
-    или незавершённых удалений EC-объектов (состояния PG has_incomplete).
-    0 отключает повторы таких запросов и клиенты не блокируются, а вместо
-    этого просто получают код ошибки EIO.
 - name: client_max_dirty_bytes
  type: int
  default: 33554432
@@ -1,7 +1,7 @@
 - name: etcd_mon_ttl
  type: sec
-  min: 5
-  default: 1
+  min: 10
+  default: 30
  info: Monitor etcd lease refresh interval in seconds
  info_ru: Интервал обновления etcd резервации (lease) монитором
 - name: etcd_mon_timeout
@@ -243,6 +243,21 @@
    Максимальное время ожидания ответа на запрос проверки состояния соединения.
    Если OSD не отвечает за это время, соединение отключается и производится
    повторная попытка соединения.
+- name: up_wait_retry_interval
+  type: ms
+  min: 50
+  default: 500
+  online: true
+  info: |
+    OSDs respond to clients with a special error code when they receive I/O
+    requests for a PG that's not synchronized and started. This parameter sets
+    the time for the clients to wait before re-attempting such I/O requests.
+  info_ru: |
+    Когда OSD получают от клиентов запросы ввода-вывода, относящиеся к не
+    поднятым на данный момент на них PG, либо к PG в процессе синхронизации,
+    они отвечают клиентам специальным кодом ошибки, означающим, что клиент
+    должен некоторое время подождать перед повторением запроса. Именно это время
+    ожидания задаёт данный параметр.
 - name: max_etcd_attempts
  type: int
  default: 5
@@ -731,19 +731,8 @@
  default: 10
  online: true
  info: |
-    Minimum possible value for auto-tuned recovery_sleep_us. Lower values
-    are changed to 0.
+    Minimum possible value for auto-tuned recovery_sleep_us. Values lower
+    than this value are changed to 0.
  info_ru: |
    Минимальное возможное значение авто-подстроенного recovery_sleep_us.
-    Меньшие значения заменяются на 0.
- name: recovery_tune_sleep_cutoff_us
-  type: us
-  default: 10000000
-  online: true
-  info: |
-    Maximum possible value for auto-tuned recovery_sleep_us. Higher values
-    are treated as outliers and ignored in aggregation.
-  info_ru: |
-    Максимальное возможное значение авто-подстроенного recovery_sleep_us.
-    Большие значения считаются случайными выбросами и игнорируются в
-    усреднении.
+    Значения ниже данного заменяются на 0.
@@ -37,7 +37,6 @@ Vitastor CSI supports:
 - Volume snapshots. Example: [snapshot class](../../csi/deploy/example-snapshot-class.yaml), [snapshot](../../csi/deploy/example-snapshot.yaml), [clone](../../csi/deploy/example-snapshot-clone.yaml)
 - [VDUSE](../usage/qemu.en.md#vduse) (preferred) and [NBD](../usage/nbd.en.md) device mapping methods
 - Upgrades with VDUSE - new handler processes are restarted when CSI pods are restarted themselves
- VDUSE daemon auto-restart - handler processes are automatically restarted if they crash due to a bug in Vitastor client code
 - Multiple clusters by using multiple configuration files in ConfigMap.

 Remember that to use snapshots with CSI you also have to install [Snapshot Controller and CRDs](https://kubernetes-csi.github.io/docs/snapshot-controller.html#deployment).
@@ -37,7 +37,6 @@ CSI-плагин Vitastor поддерживает:
 - Снимки томов. Пример: [класс снимков](../../csi/deploy/example-snapshot-class.yaml), [снимок](../../csi/deploy/example-snapshot.yaml), [клон снимка](../../csi/deploy/example-snapshot-clone.yaml)
 - Способы подключения устройств [VDUSE](../usage/qemu.ru.md#vduse) (предпочитаемый) и [NBD](../usage/nbd.ru.md)
 - Обновление при использовании VDUSE - новые процессы-обработчики устройств успешно перезапускаются вместе с самими подами CSI
- Автоперезауск демонов VDUSE - процесс-обработчик автоматически перезапустится, если он внезапно упадёт из-за бага в коде клиента Vitastor
 - Несколько кластеров через задание нескольких файлов конфигурации в ConfigMap.

 Не забывайте, что для использования снимков нужно сначала установить [контроллер снимков и CRD](https://kubernetes-csi.github.io/docs/snapshot-controller.html#deployment).
@@ -11,26 +11,19 @@ Replicated setups:
 - Single-threaded write+fsync latency:
  - With immediate commit: 2 network roundtrips + 1 disk write.
  - With lazy commit: 4 network roundtrips + 1 disk write + 1 disk flush.
- Linear read: `min(total network bandwidth, sum(disk read MB/s))`.
- Linear write: `min(total network bandwidth, sum(disk write MB/s / number of replicas))`.
- Saturated parallel read iops: `min(total network bandwidth, sum(disk read iops))`.
- Saturated parallel write iops: `min(total network bandwidth / number of replicas, sum(disk write iops / number of replicas / (write amplification = 4)))`.
+- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
+- Saturated parallel write iops: min(network bandwidth, sum(disk write iops / number of replicas / write amplification)).

-EC/XOR setups (EC N+K):
+EC/XOR setups:
 - Single-threaded (T1Q1) read latency: 1.5 network roundtrips + 1 disk read.
 - Single-threaded write+fsync latency:
  - With immediate commit: 3.5 network roundtrips + 1 disk read + 2 disk writes.
  - With lazy commit: 5.5 network roundtrips + 1 disk read + 2 disk writes + 2 disk fsyncs.
-  - 0.5 in actually `(N-1)/N` which means that an additional roundtrip doesn't happen when
+  - 0.5 in actually (k-1)/k which means that an additional roundtrip doesn't happen when
    the read sub-operation can be served locally.
- Linear read: `min(total network bandwidth, sum(disk read MB/s))`.
- Linear write: `min(total network bandwidth, sum(disk write MB/s * N/(N+K)))`.
- Saturated parallel read iops: `min(total network bandwidth, sum(disk read iops))`.
- Saturated parallel write iops: roughly `total iops / (N+K) / WA`. More exactly,
-  `min(total network bandwidth * N/(N+K), sum(disk randrw iops / (N*4 + K*5 + 1)))` with
-  random read/write mix corresponding to `(N-1)/(N*4 + K*5 + 1)*100 % reads`.
-  - For example, with EC 2+1 it is: `(7% randrw iops) / 14`.
-  - With EC 6+3 it is: `(12.5% randrw iops) / 40`.
+- Saturated parallel read iops: min(network bandwidth, sum(disk read iops)).
+- Saturated parallel write iops: min(network bandwidth, sum(disk write iops * number of data drives / (number of data + parity drives) / write amplification)).
+  In fact, you should put disk write iops under the condition of ~10% reads / ~90% writes in this formula.

 Write amplification for 4 KB blocks is usually 3-5 in Vitastor:
 1. Journal block write
@@ -11,27 +11,20 @@
 - Запись+fsync в 1 поток:
  - С мгновенным сбросом: 2 RTT + 1 запись.
  - С отложенным ("ленивым") сбросом: 4 RTT + 1 запись + 1 fsync.
- Линейное чтение: сумма МБ/с чтения всех дисков, либо общая производительность сети (сумма пропускной способности сети всех нод), если в сеть упрётся раньше.
- Линейная запись: сумма МБ/с записи всех дисков / число реплик, либо производительность сети / число реплик, если в сеть упрётся раньше.
- Параллельное случайное мелкое чтение: сумма IOPS чтения всех дисков, либо производительность сети, если в сеть упрётся раньше.
- Параллельная случайная мелкая запись: сумма IOPS записи всех дисков / число реплик / WA, либо производительность сети / число реплик, если в сеть упрётся раньше.
+- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
+- Параллельная запись: сумма IOPS всех дисков / число реплик / WA либо производительность сети, если в сеть упрётся раньше.

-При использовании кодов коррекции ошибок (EC N+K):
+При использовании кодов коррекции ошибок (EC):
 - Задержка чтения в 1 поток (T1Q1): 1.5 RTT + 1 чтение.
 - Запись+fsync в 1 поток:
  - С мгновенным сбросом: 3.5 RTT + 1 чтение + 2 записи.
  - С отложенным ("ленивым") сбросом: 5.5 RTT + 1 чтение + 2 записи + 2 fsync.
- Под 0.5 на самом деле подразумевается (N-1)/N, где N - число дисков данных,
+- Под 0.5 на самом деле подразумевается (k-1)/k, где k - число дисков данных,
  что означает, что дополнительное обращение по сети не нужно, когда операция
  чтения обслуживается локально.
- Линейное чтение: сумма МБ/с чтения всех дисков, либо общая производительность сети, если в сеть упрётся раньше.
- Линейная запись: сумма МБ/с записи всех дисков * N/(N+K), либо производительность сети * N / (N+K), если в сеть упрётся раньше.
- Параллельное случайное мелкое чтение: сумма IOPS чтения всех дисков либо производительность сети, если в сеть упрётся раньше.
- Параллельная случайная мелкая запись: грубо `(сумма IOPS / (N+K) / WA)`. Если точнее, то:
-  сумма смешанного IOPS всех дисков при `(N-1)/(N*4 + K*5 + 1)*100 %` чтения, делённая на `(N*4 + K*5 + 1)`.
-  Либо, производительность сети * N/(N+K), если в сеть упрётся раньше.
-  - Например, при EC 2+1 это: `(сумма IOPS при 7% чтения) / 14`.
-  - При EC 6+3 это: `(сумма IOPS при 12.5% чтения) / 40`.
+- Параллельное чтение: сумма IOPS всех дисков либо производительность сети, если в сеть упрётся раньше.
+- Параллельная запись: сумма IOPS всех дисков / общее число дисков данных и чётности / WA либо производительность сети, если в сеть упрётся раньше.
+  Примечание: IOPS дисков в данном случае надо брать в смешанном режиме чтения/записи в пропорции, аналогичной формулам выше.

 WA (мультипликатор записи) для 4 КБ блоков в Vitastor обычно составляет 3-5:
 1. Запись метаданных в журнал
@@ -131,18 +131,19 @@ See also about [how to export snapshots](qemu.en.md#exporting-snapshots).

 ## modify

-`vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force] [--down-ok]`
+`vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force]`

 Rename, resize image or change its readonly status. Images with children can't be made read-write.
 If the new size is smaller than the old size, extra data will be purged.
 You should resize file system in the image, if present, before shrinking it.

-| `-f|--force` | Proceed with shrinking or setting readwrite flag even if the image has children. |
-| `--down-ok`  | Proceed with shrinking even if some data will be left on unavailable OSDs.       |
+```
+-f|--force  Proceed with shrinking or setting readwrite flag even if the image has children.
+```

 ## rm

-`vitastor-cli rm <from> [<to>] [--writers-stopped] [--down-ok]`
+`vitastor-cli rm <from> [<to>] [--writers-stopped]`

 Remove `<from>` or all layers between `<from>` and `<to>` (`<to>` must be a child of `<from>`),
 rebasing all their children accordingly. --writers-stopped allows merging to be a bit
@@ -150,10 +151,6 @@ more effective in case of a single 'slim' read-write child and 'fat' removed par
 the child is merged into parent and parent is renamed to child in that case.
 In other cases parent layers are always merged into children.

-Other options:
-
-| `--down-ok` | Continue deletion/merging even if some data will be left on unavailable OSDs. |
-
 ## flatten

 `vitastor-cli flatten <layer>`
@@ -132,7 +132,7 @@ vitastor-cli snap-create [-p|--pool <id|name>] <image>@<snapshot>

 ## modify

-`vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force] [--down-ok]`
+`vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force]`

 Изменить размер, имя образа или флаг "только для чтения". Снимать флаг "только для чтения"
 и уменьшать размер образов, у которых есть дочерние клоны, без `--force` нельзя.
@@ -140,12 +140,13 @@ vitastor-cli snap-create [-p|--pool <id|name>] <image>@<snapshot>
 Если новый размер меньше старого, "лишние" данные будут удалены, поэтому перед уменьшением
 образа сначала уменьшите файловую систему в нём.

-| -f|--force | Разрешить уменьшение или перевод в чтение-запись образа, у которого есть клоны.        |
-| --down-ok  | Разрешить уменьшение, даже если часть данных останется неудалённой на недоступных OSD. |
+```
+-f|--force  Разрешить уменьшение или перевод в чтение-запись образа, у которого есть клоны.
+```

 ## rm

-`vitastor-cli rm <from> [<to>] [--writers-stopped] [--down-ok]`
+`vitastor-cli rm <from> [<to>] [--writers-stopped]`

 Удалить образ `<from>` или все слои от `<from>` до `<to>` (`<to>` должен быть дочерним
 образом `<from>`), одновременно меняя родительские образы их клонов (если таковые есть).
@@ -157,10 +158,6 @@ vitastor-cli snap-create [-p|--pool <id|name>] <image>@<snapshot>

 В других случаях родительские слои вливаются в дочерние.

-Другие опции:
-
-| `--down-ok` | Продолжать удаление/слияние, даже если часть данных останется неудалённой на недоступных OSD. |
-
 ## flatten

 `vitastor-cli flatten <layer>`
@@ -261,7 +261,7 @@ Options (see also [Cluster-Wide Disk Layout Parameters](../config/layout-cluster
 ```
 --object_size 128k       Set blockstore block size
 --bitmap_granularity 4k  Set bitmap granularity
--journal_size 32M       Set journal size
+--journal_size 16M       Set journal size
 --data_csum_type none    Set data checksum type (crc32c or none)
 --csum_block_size 4k     Set data checksum block size
 --device_block_size 4k   Set device block size
@@ -267,7 +267,7 @@ OSD отключены fsync-и.
 ```
 --object_size 128k       Размер блока хранилища
 --bitmap_granularity 4k  Гранулярность битовых карт
--journal_size 32M       Размер журнала
+--journal_size 16M       Размер журнала
 --data_csum_type none    Задать тип контрольных сумм (crc32c или none)
 --csum_block_size 4k     Задать размер блока расчёта контрольных сумм
 --device_block_size 4k   Размер блока устройства
@@ -55,7 +55,7 @@ const etcd_tree = {
            // etcd connection - configurable online
            etcd_address: "10.0.115.10:2379/v3",
            // mon
-            etcd_mon_ttl: 5, // min: 1
+            etcd_mon_ttl: 30, // min: 10
            etcd_mon_timeout: 1000, // ms. min: 0
            etcd_mon_retries: 5, // min: 0
            mon_change_timeout: 1000, // ms. min: 100
@@ -86,14 +86,13 @@ const etcd_tree = {
            client_max_buffered_bytes: 33554432,
            client_max_buffered_ops: 1024,
            client_max_writeback_iodepth: 256,
-            client_retry_interval: 50, // ms. min: 10
-            client_eio_retry_interval: 1000, // ms
            // client and osd - configurable online
            log_level: 0,
            peer_connect_interval: 5, // seconds. min: 1
            peer_connect_timeout: 5, // seconds. min: 1
            osd_idle_timeout: 5, // seconds. min: 1
            osd_ping_timeout: 5, // seconds. min: 1
+            up_wait_retry_interval: 500, // ms. min: 50
            max_etcd_attempts: 5,
            etcd_quick_timeout: 1000, // ms
            etcd_slow_timeout: 5000, // ms
@@ -391,8 +390,7 @@ class Mon
 {
    constructor(config)
    {
-        this.failconnect = (e) => this._die(e, 2);
-        this.die = (e) => this._die(e, 1);
+        this.die = (e) => this._die(e);
        if (fs.existsSync(config.config_path||'/etc/vitastor/vitastor.conf'))
        {
            config = {
@@ -481,10 +479,10 @@ class Mon

    check_config()
    {
-        this.config.etcd_mon_ttl = Number(this.config.etcd_mon_ttl) || 5;
-        if (this.config.etcd_mon_ttl < 1)
+        this.config.etcd_mon_ttl = Number(this.config.etcd_mon_ttl) || 30;
+        if (this.config.etcd_mon_ttl < 10)
        {
-            this.config.etcd_mon_ttl = 1;
+            this.config.etcd_mon_ttl = 10;
        }
        this.config.etcd_mon_timeout = Number(this.config.etcd_mon_timeout) || 0;
        if (this.config.etcd_mon_timeout <= 0)
@@ -606,7 +604,7 @@ class Mon
        }
        if (!this.ws)
        {
-            this.failconnect('Failed to open etcd watch websocket');
+            this.die('Failed to open etcd watch websocket');
        }
        const cur_addr = this.selected_etcd_url;
        this.ws_alive = true;
@@ -676,12 +674,7 @@ class Mon
                {
                    this.parse_kv(e.kv);
                    const key = e.kv.key.substr(this.etcd_prefix.length);
-                    if (key.substr(0, 11) == '/osd/state/')
-                    {
-                        stats_changed = true;
-                        changed = true;
-                    }
-                    else if (key.substr(0, 11) == '/osd/stats/' || key.substr(0, 10) == '/pg/stats/' || key.substr(0, 16) == '/osd/inodestats/')
+                    if (key.substr(0, 11) == '/osd/stats/' || key.substr(0, 10) == '/pg/stats/' || key.substr(0, 16) == '/osd/inodestats/')
                    {
                        stats_changed = true;
                    }
@@ -798,9 +791,9 @@ class Mon
            const res = await this.etcd_call('/lease/keepalive', { ID: this.etcd_lease_id }, this.config.etcd_mon_timeout, this.config.etcd_mon_retries);
            if (!res.result.TTL)
            {
-                this.failconnect('Lease expired');
+                this.die('Lease expired');
            }
-        }, this.config.etcd_mon_ttl*1000);
+        }, this.config.etcd_mon_timeout);
        if (!this.signals_set)
        {
            process.on('SIGINT', this.on_stop_cb);
@@ -1421,14 +1414,7 @@ class Mon
            }
            if (changed)
            {
-                const ok = await this.save_pg_config(new_config_pgs);
-                if (ok)
-                    console.log('PG configuration successfully changed');
-                else
-                {
-                    console.log('Someone changed PG configuration while we also tried to change it. Retrying in '+this.config.mon_change_timeout+' ms');
-                    this.schedule_recheck();
-                }
+                await this.save_pg_config(new_config_pgs);
            }
        }
        this.recheck_pgs_active = false;
@@ -1509,11 +1495,6 @@ class Mon
            this.save_new_pgs_txn(new_config_pgs, etcd_request, pool_id, up_osds, osd_tree, real_prev_pgs, pool_res.pgs, pg_history);
        }
        new_config_pgs.hash = tree_hash;
-        return await this.save_pg_config(new_config_pgs, etcd_request);
-    }
-
-    async save_pg_config(new_config_pgs, etcd_request = { compare: [], success: [] })
-    {
        etcd_request.compare.push(
            { key: b64(this.etcd_prefix+'/mon/master'), target: 'LEASE', lease: ''+this.etcd_lease_id },
            { key: b64(this.etcd_prefix+'/config/pgs'), target: 'MOD', mod_revision: ''+this.etcd_watch_revision, result: 'LESS' },
@@ -1641,13 +1622,9 @@ class Mon
        }
        const sum_diff = { op_stats: {}, subop_stats: {}, recovery_stats: {} };
        // Sum derived values instead of deriving summed
-        for (const osd in this.state.osd.state)
+        for (const osd in this.state.osd.stats)
        {
            const derived = this.prev_stats.osd_diff[osd];
-            if (!this.state.osd.state[osd] || !derived)
-            {
-                continue;
-            }
            for (const type in sum_diff)
            {
                for (const op in derived[type]||{})
@@ -1748,13 +1725,9 @@ class Mon
            const used = this.state.pool.stats[pool_id].used_raw_tb;
            this.state.pool.stats[pool_id].used_raw_tb = Number(used)/1024/1024/1024/1024;
        }
-        for (const osd_num in this.state.osd.state)
+        for (const osd_num in this.state.osd.inodestats)
        {
            const ist = this.state.osd.inodestats[osd_num];
-            if (!ist || !this.state.osd.state[osd_num])
-            {
-                continue;
-            }
            for (const pool_id in ist)
            {
                inode_stats[pool_id] = inode_stats[pool_id] || {};
@@ -1770,14 +1743,9 @@ class Mon
                }
            }
        }
-        for (const osd in this.state.osd.state)
+        for (const osd in this.prev_stats.osd_diff)
        {
-            const osd_diff = this.prev_stats.osd_diff[osd];
-            if (!osd_diff || !this.state.osd.state[osd])
-            {
-                continue;
-            }
-            for (const pool_id in osd_diff.inode_stats)
+            for (const pool_id in this.prev_stats.osd_diff[osd].inode_stats)
            {
                for (const inode_num in this.prev_stats.osd_diff[osd].inode_stats[pool_id])
                {
@@ -2017,14 +1985,14 @@ class Mon
                return res.json;
            }
        }
-        this.failconnect();
+        this.die();
    }

-    _die(err, code)
+    _die(err)
    {
        // In fact we can just try to rejoin
        console.error(new Error(err || 'Cluster connection failed'));
-        process.exit(code || 2);
+        process.exit(1);
    }

    local_ips(all)
@@ -1,6 +1,6 @@
 {
  "name": "vitastor-mon",
-  "version": "1.4.8",
+  "version": "1.3.1",
  "description": "Vitastor SDS monitor service",
  "main": "mon-main.js",
  "scripts": {
@@ -8,9 +8,7 @@ PartOf=vitastor.target
 LimitNOFILE=1048576
 LimitNPROC=1048576
 LimitMEMLOCK=infinity
-# Use the following for direct logs to files
-#ExecStart=bash -c 'exec vitastor-disk exec-osd /dev/vitastor/osd%i-data >>/var/log/vitastor/osd%i.log 2>&1'
-ExecStart=vitastor-disk exec-osd /dev/vitastor/osd%i-data
+ExecStart=bash -c 'exec vitastor-disk exec-osd /dev/vitastor/osd%i-data >>/var/log/vitastor/osd%i.log 2>&1'
 ExecStartPre=+vitastor-disk pre-exec /dev/vitastor/osd%i-data
 WorkingDirectory=/
 User=vitastor
@@ -50,7 +50,7 @@ from cinder.volume import configuration
 from cinder.volume import driver
 from cinder.volume import volume_utils

-VERSION = '1.4.8'
+VERSION = '1.3.1'

 LOG = logging.getLogger(__name__)

@@ -1,692 +0,0 @@
-commit d85024bd803b3b91f15578ed22de4ce31856626f
-Author: Vitaliy Filippov <vitalif@yourcmc.ru>
-Date:   Wed Jan 24 18:07:43 2024 +0300
-
-    Add Vitastor support
-
-diff --git a/docs/schemas/domaincommon.rng b/docs/schemas/domaincommon.rng
-index 7fa5c2b8b5..2d77f391e7 100644
--- a/docs/schemas/domaincommon.rng
-+++ b/docs/schemas/domaincommon.rng
-@@ -1898,6 +1898,35 @@
-     </element>
-   </define>
- 
-+  <define name="diskSourceNetworkProtocolVitastor">
-+    <element name="source">
-+      <interleave>
-+        <attribute name="protocol">
-+          <value>vitastor</value>
-+        </attribute>
-+        <ref name="diskSourceCommon"/>
-+        <optional>
-+          <attribute name="name"/>
-+        </optional>
-+        <optional>
-+          <attribute name="query"/>
-+        </optional>
-+        <zeroOrMore>
-+          <ref name="diskSourceNetworkHost"/>
-+        </zeroOrMore>
-+        <optional>
-+          <element name="config">
-+            <attribute name="file">
-+              <ref name="absFilePath"/>
-+            </attribute>
-+            <empty/>
-+          </element>
-+        </optional>
-+        <empty/>
-+      </interleave>
-+    </element>
-+  </define>
-+
-   <define name="diskSourceNetworkProtocolISCSI">
-     <element name="source">
-       <attribute name="protocol">
-@@ -2154,6 +2183,7 @@
-       <ref name="diskSourceNetworkProtocolSimple"/>
-       <ref name="diskSourceNetworkProtocolVxHS"/>
-       <ref name="diskSourceNetworkProtocolNFS"/>
-+      <ref name="diskSourceNetworkProtocolVitastor"/>
-     </choice>
-   </define>
- 
-diff --git a/include/libvirt/libvirt-storage.h b/include/libvirt/libvirt-storage.h
-index f89856b93e..a8cb9387e2 100644
--- a/include/libvirt/libvirt-storage.h
-+++ b/include/libvirt/libvirt-storage.h
-@@ -246,6 +246,7 @@ typedef enum {
-     VIR_CONNECT_LIST_STORAGE_POOLS_ZFS           = 1 << 17,
-     VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE      = 1 << 18,
-     VIR_CONNECT_LIST_STORAGE_POOLS_ISCSI_DIRECT  = 1 << 19,
-+    VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR      = 1 << 20,
- } virConnectListAllStoragePoolsFlags;
- 
- int                     virConnectListAllStoragePools(virConnectPtr conn,
-diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 5691b8d2d5..6669e8451d 100644
--- a/src/conf/domain_conf.c
-+++ b/src/conf/domain_conf.c
-@@ -8293,7 +8293,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
-     src->configFile = virXPathString("string(./config/@file)", ctxt);
- 
-     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
-        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS)
-+        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS ||
-+        src->protocol == VIR_STORAGE_NET_PROTOCOL_VITASTOR)
-         src->query = virXMLPropString(node, "query");
- 
-     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
-@@ -31267,6 +31268,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSource *src,
- 
-     case VIR_STORAGE_POOL_MPATH:
-     case VIR_STORAGE_POOL_RBD:
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_SHEEPDOG:
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_LAST:
-diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
-index a4271f1247..621c1b7b31 100644
--- a/src/conf/domain_validate.c
-+++ b/src/conf/domain_validate.c
-@@ -508,7 +508,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
-         }
-     }
- 
-    /* internal snapshots and config files are currently supported only with rbd: */
-+    /* internal snapshots are currently supported only with rbd: */
-     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
-         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
-         if (src->snapshot) {
-@@ -517,11 +517,15 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
-                              "only with 'rbd' disks"));
-             return -1;
-         }
-
-+    }
-+    /* config files are currently supported only with rbd and vitastor: */
-+    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
-+        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
-+        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
-         if (src->configFile) {
-             virReportError(VIR_ERR_XML_ERROR, "%s",
-                            _("<config> element is currently supported "
-                             "only with 'rbd' disks"));
-+                             "only with 'rbd' and 'vitastor' disks"));
-             return -1;
-         }
-     }
-diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
-index 6690d26ffd..2255df9d28 100644
--- a/src/conf/storage_conf.c
-+++ b/src/conf/storage_conf.c
-@@ -60,7 +60,7 @@ VIR_ENUM_IMPL(virStoragePool,
-               "logical", "disk", "iscsi",
-               "iscsi-direct", "scsi", "mpath",
-               "rbd", "sheepdog", "gluster",
-              "zfs", "vstorage",
-+              "zfs", "vstorage", "vitastor",
- );
- 
- VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
-@@ -246,6 +246,18 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
-           .formatToString = virStorageFileFormatTypeToString,
-       }
-     },
-+    {.poolType = VIR_STORAGE_POOL_VITASTOR,
-+     .poolOptions = {
-+         .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
-+                   VIR_STORAGE_POOL_SOURCE_NETWORK |
-+                   VIR_STORAGE_POOL_SOURCE_NAME),
-+      },
-+      .volOptions = {
-+          .defaultFormat = VIR_STORAGE_FILE_RAW,
-+          .formatFromString = virStorageVolumeFormatFromString,
-+          .formatToString = virStorageFileFormatTypeToString,
-+      }
-+    },
-     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
-      .poolOptions = {
-          .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
-@@ -546,6 +558,11 @@ virStoragePoolDefParseSource(xmlXPathContextPtr ctxt,
-                        _("element 'name' is mandatory for RBD pool"));
-         return -1;
-     }
-+    if (pool_type == VIR_STORAGE_POOL_VITASTOR && source->name == NULL) {
-+        virReportError(VIR_ERR_XML_ERROR, "%s",
-+                       _("element 'name' is mandatory for Vitastor pool"));
-+        return -1;
-+    }
- 
-     if (options->formatFromString) {
-         g_autofree char *format = NULL;
-@@ -1176,6 +1193,7 @@ virStoragePoolDefFormatBuf(virBuffer *buf,
-     /* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
-      * files, so they don't have a target */
-     if (def->type != VIR_STORAGE_POOL_RBD &&
-+        def->type != VIR_STORAGE_POOL_VITASTOR &&
-         def->type != VIR_STORAGE_POOL_SHEEPDOG &&
-         def->type != VIR_STORAGE_POOL_GLUSTER &&
-         def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
-diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h
-index aaecf138d6..97172db38b 100644
--- a/src/conf/storage_conf.h
-+++ b/src/conf/storage_conf.h
-@@ -106,6 +106,7 @@ typedef enum {
-     VIR_STORAGE_POOL_GLUSTER,  /* Gluster device */
-     VIR_STORAGE_POOL_ZFS,      /* ZFS */
-     VIR_STORAGE_POOL_VSTORAGE, /* Virtuozzo Storage */
-+    VIR_STORAGE_POOL_VITASTOR, /* Vitastor */
- 
-     VIR_STORAGE_POOL_LAST,
- } virStoragePoolType;
-@@ -466,6 +467,7 @@ VIR_ENUM_DECL(virStoragePartedFs);
-                  VIR_CONNECT_LIST_STORAGE_POOLS_SCSI     | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_MPATH    | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_RBD      | \
-+                 VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER  | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_ZFS      | \
-diff --git a/src/conf/storage_source_conf.c b/src/conf/storage_source_conf.c
-index d42f715f26..29d8da3d10 100644
--- a/src/conf/storage_source_conf.c
-+++ b/src/conf/storage_source_conf.c
-@@ -86,6 +86,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
-               "ssh",
-               "vxhs",
-               "nfs",
-+              "vitastor",
- );
- 
- 
-@@ -1265,6 +1266,7 @@ virStorageSourceNetworkDefaultPort(virStorageNetProtocol protocol)
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-             return 24007;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-             /* we don't provide a default for RBD */
-             return 0;
-diff --git a/src/conf/storage_source_conf.h b/src/conf/storage_source_conf.h
-index c4a026881c..67568e9181 100644
--- a/src/conf/storage_source_conf.h
-+++ b/src/conf/storage_source_conf.h
-@@ -128,6 +128,7 @@ typedef enum {
-     VIR_STORAGE_NET_PROTOCOL_SSH,
-     VIR_STORAGE_NET_PROTOCOL_VXHS,
-     VIR_STORAGE_NET_PROTOCOL_NFS,
-+    VIR_STORAGE_NET_PROTOCOL_VITASTOR,
- 
-     VIR_STORAGE_NET_PROTOCOL_LAST
- } virStorageNetProtocol;
-diff --git a/src/conf/virstorageobj.c b/src/conf/virstorageobj.c
-index 02903ac487..504df599fb 100644
--- a/src/conf/virstorageobj.c
-+++ b/src/conf/virstorageobj.c
-@@ -1481,6 +1481,7 @@ virStoragePoolObjSourceFindDuplicateCb(const void *payload,
-             return 1;
-         break;
- 
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_RBD:
-     case VIR_STORAGE_POOL_LAST:
-         break;
-@@ -1978,6 +1979,8 @@ virStoragePoolObjMatch(virStoragePoolObj *obj,
-                (obj->def->type == VIR_STORAGE_POOL_MPATH))   ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) &&
-                (obj->def->type == VIR_STORAGE_POOL_RBD))     ||
-+              (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR) &&
-+               (obj->def->type == VIR_STORAGE_POOL_VITASTOR)) ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) &&
-                (obj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER) &&
-diff --git a/src/libvirt-storage.c b/src/libvirt-storage.c
-index cbc522b300..b4760fa58d 100644
--- a/src/libvirt-storage.c
-+++ b/src/libvirt-storage.c
-@@ -92,6 +92,7 @@ virStoragePoolGetConnect(virStoragePoolPtr pool)
-  * VIR_CONNECT_LIST_STORAGE_POOLS_SCSI
-  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
-  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
-+ * VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR
-  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
-  * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
-  * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
-diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
-index 1ac6253ad7..abe4587f94 100644
--- a/src/libxl/libxl_conf.c
-+++ b/src/libxl/libxl_conf.c
-@@ -962,6 +962,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSource *src,
-     case VIR_STORAGE_NET_PROTOCOL_SSH:
-     case VIR_STORAGE_NET_PROTOCOL_VXHS:
-     case VIR_STORAGE_NET_PROTOCOL_NFS:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-         virReportError(VIR_ERR_NO_SUPPORT,
-diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
-index 7604e3d534..6453bb9776 100644
--- a/src/libxl/xen_xl.c
-+++ b/src/libxl/xen_xl.c
-@@ -1506,6 +1506,7 @@ xenFormatXLDiskSrcNet(virStorageSource *src)
-     case VIR_STORAGE_NET_PROTOCOL_SSH:
-     case VIR_STORAGE_NET_PROTOCOL_VXHS:
-     case VIR_STORAGE_NET_PROTOCOL_NFS:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-         virReportError(VIR_ERR_NO_SUPPORT,
-diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
-index e5ff653a60..884ecc79ea 100644
--- a/src/qemu/qemu_block.c
-+++ b/src/qemu/qemu_block.c
-@@ -943,6 +943,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
- }
- 
- 
-+static virJSONValue *
-+qemuBlockStorageSourceGetVitastorProps(virStorageSource *src)
-+{
-+    virJSONValue *ret = NULL;
-+    virStorageNetHostDef *host;
-+    size_t i;
-+    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
-+    g_autofree char *etcd = NULL;
-+
-+    for (i = 0; i < src->nhosts; i++) {
-+        host = src->hosts + i;
-+        if ((virStorageNetHostTransport)host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
-+            return NULL;
-+        }
-+        virBufferAsprintf(&buf, i > 0 ? ",%s:%u" : "%s:%u", host->name, host->port);
-+    }
-+    if (src->nhosts > 0) {
-+        etcd = virBufferContentAndReset(&buf);
-+    }
-+
-+    if (virJSONValueObjectCreate(&ret,
-+                                 "S:etcd-host", etcd,
-+                                 "S:etcd-prefix", src->query,
-+                                 "S:config-path", src->configFile,
-+                                 "s:image", src->path,
-+                                 NULL) < 0)
-+        return NULL;
-+
-+    return ret;
-+}
-+
-+
- static virJSONValue *
- qemuBlockStorageSourceGetSheepdogProps(virStorageSource *src)
- {
-@@ -1233,6 +1265,12 @@ qemuBlockStorageSourceGetBackendProps(virStorageSource *src,
-                 return NULL;
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+            driver = "vitastor";
-+            if (!(fileprops = qemuBlockStorageSourceGetVitastorProps(src)))
-+                return NULL;
-+            break;
-+
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             driver = "sheepdog";
-             if (!(fileprops = qemuBlockStorageSourceGetSheepdogProps(src)))
-@@ -2244,6 +2282,7 @@ qemuBlockGetBackingStoreString(virStorageSource *src,
- 
-             case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             case VIR_STORAGE_NET_PROTOCOL_RBD:
-+            case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-             case VIR_STORAGE_NET_PROTOCOL_VXHS:
-             case VIR_STORAGE_NET_PROTOCOL_NFS:
-             case VIR_STORAGE_NET_PROTOCOL_SSH:
-@@ -2626,6 +2665,12 @@ qemuBlockStorageSourceCreateGetStorageProps(virStorageSource *src,
-                 return -1;
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+            driver = "vitastor";
-+            if (!(location = qemuBlockStorageSourceGetVitastorProps(src)))
-+                return -1;
-+            break;
-+
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             driver = "sheepdog";
-             if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
-diff --git a/src/qemu/qemu_command.c b/src/qemu/qemu_command.c
-index d822533ccb..afe2087303 100644
--- a/src/qemu/qemu_command.c
-+++ b/src/qemu/qemu_command.c
-@@ -1723,6 +1723,43 @@ qemuBuildNetworkDriveStr(virStorageSource *src,
-             ret = virBufferContentAndReset(&buf);
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+            if (strchr(src->path, ':')) {
-+                virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
-+                               _("':' not allowed in Vitastor source volume name '%s'"),
-+                               src->path);
-+                return NULL;
-+            }
-+
-+            virBufferStrcat(&buf, "vitastor:image=", src->path, NULL);
-+
-+            if (src->nhosts > 0) {
-+                virBufferAddLit(&buf, ":etcd-host=");
-+                for (i = 0; i < src->nhosts; i++) {
-+                    if (i)
-+                        virBufferAddLit(&buf, ",");
-+
-+                    /* assume host containing : is ipv6 */
-+                    if (strchr(src->hosts[i].name, ':'))
-+                        virBufferEscape(&buf, '\\', ":", "[%s]",
-+                                        src->hosts[i].name);
-+                    else
-+                        virBufferAsprintf(&buf, "%s", src->hosts[i].name);
-+
-+                    if (src->hosts[i].port)
-+                        virBufferAsprintf(&buf, "\\:%u", src->hosts[i].port);
-+                }
-+            }
-+
-+            if (src->configFile)
-+                virBufferEscape(&buf, '\\', ":", ":config-path=%s", src->configFile);
-+
-+            if (src->query)
-+                virBufferEscape(&buf, '\\', ":", ":etcd-prefix=%s", src->query);
-+
-+            ret = virBufferContentAndReset(&buf);
-+            break;
-+
-         case VIR_STORAGE_NET_PROTOCOL_VXHS:
-             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                            _("VxHS protocol does not support URI syntax"));
-diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
-index a8401bac30..3dc1fe6db0 100644
--- a/src/qemu/qemu_domain.c
-+++ b/src/qemu/qemu_domain.c
-@@ -4731,7 +4731,8 @@ qemuDomainValidateStorageSource(virStorageSource *src,
-     if (src->query &&
-         (actualType != VIR_STORAGE_TYPE_NETWORK ||
-          (src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTPS &&
-          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP))) {
-+          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP &&
-+          src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR))) {
-         virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                        _("query is supported only with HTTP(S) protocols"));
-         return -1;
-@@ -9919,6 +9920,7 @@ qemuDomainPrepareStorageSourceTLS(virStorageSource *src,
-         break;
- 
-     case VIR_STORAGE_NET_PROTOCOL_RBD:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
-index f92e00f9c0..854a3fbc90 100644
--- a/src/qemu/qemu_snapshot.c
-+++ b/src/qemu/qemu_snapshot.c
-@@ -393,6 +393,7 @@ qemuSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDef *snapdisk,
-         case VIR_STORAGE_NET_PROTOCOL_NONE:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-@@ -485,6 +486,7 @@ qemuSnapshotPrepareDiskExternalActive(virDomainObj *vm,
-         case VIR_STORAGE_NET_PROTOCOL_NONE:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-         case VIR_STORAGE_NET_PROTOCOL_HTTP:
-@@ -638,6 +640,7 @@ qemuSnapshotPrepareDiskInternal(virDomainDiskDef *disk,
-         case VIR_STORAGE_NET_PROTOCOL_NONE:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
-index 4df2c75a2b..5a5e48ef71 100644
--- a/src/storage/storage_driver.c
-+++ b/src/storage/storage_driver.c
-@@ -1643,6 +1643,7 @@ storageVolLookupByPathCallback(virStoragePoolObj *obj,
- 
-         case VIR_STORAGE_POOL_GLUSTER:
-         case VIR_STORAGE_POOL_RBD:
-+        case VIR_STORAGE_POOL_VITASTOR:
-         case VIR_STORAGE_POOL_SHEEPDOG:
-         case VIR_STORAGE_POOL_ZFS:
-         case VIR_STORAGE_POOL_LAST:
-diff --git a/src/storage_file/storage_source_backingstore.c b/src/storage_file/storage_source_backingstore.c
-index e48ae725ab..2017ccc88c 100644
--- a/src/storage_file/storage_source_backingstore.c
-+++ b/src/storage_file/storage_source_backingstore.c
-@@ -284,6 +284,75 @@ virStorageSourceParseRBDColonString(const char *rbdstr,
- }
- 
- 
-+static int
-+virStorageSourceParseVitastorColonString(const char *colonstr,
-+                                         virStorageSource *src)
-+{
-+    char *p, *e, *next;
-+    g_autofree char *options = NULL;
-+
-+    /* optionally skip the "vitastor:" prefix if provided */
-+    if (STRPREFIX(colonstr, "vitastor:"))
-+        colonstr += strlen("vitastor:");
-+
-+    options = g_strdup(colonstr);
-+
-+    p = options;
-+    while (*p) {
-+        /* find : delimiter or end of string */
-+        for (e = p; *e && *e != ':'; ++e) {
-+            if (*e == '\\') {
-+                e++;
-+                if (*e == '\0')
-+                    break;
-+            }
-+        }
-+        if (*e == '\0') {
-+            next = e;    /* last kv pair */
-+        } else {
-+            next = e + 1;
-+            *e = '\0';
-+        }
-+
-+        if (STRPREFIX(p, "image=")) {
-+            src->path = g_strdup(p + strlen("image="));
-+        } else if (STRPREFIX(p, "etcd-prefix=")) {
-+            src->query = g_strdup(p + strlen("etcd-prefix="));
-+        } else if (STRPREFIX(p, "config-path=")) {
-+            src->configFile = g_strdup(p + strlen("config-path="));
-+        } else if (STRPREFIX(p, "etcd-host=")) {
-+            char *h, *sep;
-+
-+            h = p + strlen("etcd-host=");
-+            while (h < e) {
-+                for (sep = h; sep < e; ++sep) {
-+                    if (*sep == '\\' && (sep[1] == ',' ||
-+                                         sep[1] == ';' ||
-+                                         sep[1] == ' ')) {
-+                        *sep = '\0';
-+                        sep += 2;
-+                        break;
-+                    }
-+                }
-+
-+                if (virStorageSourceRBDAddHost(src, h) < 0)
-+                    return -1;
-+
-+                h = sep;
-+            }
-+        }
-+
-+        p = next;
-+    }
-+
-+    if (!src->path) {
-+        return -1;
-+    }
-+
-+    return 0;
-+}
-+
-+
- static int
- virStorageSourceParseNBDColonString(const char *nbdstr,
-                                     virStorageSource *src)
-@@ -396,6 +465,11 @@ virStorageSourceParseBackingColon(virStorageSource *src,
-             return -1;
-         break;
- 
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+        if (virStorageSourceParseVitastorColonString(path, src) < 0)
-+            return -1;
-+        break;
-+
-     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-@@ -984,6 +1058,54 @@ virStorageSourceParseBackingJSONRBD(virStorageSource *src,
-     return 0;
- }
- 
-+static int
-+virStorageSourceParseBackingJSONVitastor(virStorageSource *src,
-+                                         virJSONValue *json,
-+                                         const char *jsonstr G_GNUC_UNUSED,
-+                                         int opaque G_GNUC_UNUSED)
-+{
-+    const char *filename;
-+    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config-path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
-+    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
-+    size_t nservers;
-+    size_t i;
-+
-+    src->type = VIR_STORAGE_TYPE_NETWORK;
-+    src->protocol = VIR_STORAGE_NET_PROTOCOL_VITASTOR;
-+
-+    /* legacy syntax passed via 'filename' option */
-+    if ((filename = virJSONValueObjectGetString(json, "filename")))
-+        return virStorageSourceParseVitastorColonString(filename, src);
-+
-+    if (!image) {
-+        virReportError(VIR_ERR_INVALID_ARG, "%s",
-+                       _("missing image name in Vitastor backing volume "
-+                         "JSON specification"));
-+        return -1;
-+    }
-+
-+    src->path = g_strdup(image);
-+    src->configFile = g_strdup(conf);
-+    src->query = g_strdup(etcd_prefix);
-+
-+    if (servers) {
-+        nservers = virJSONValueArraySize(servers);
-+
-+        src->hosts = g_new0(virStorageNetHostDef, nservers);
-+        src->nhosts = nservers;
-+
-+        for (i = 0; i < nservers; i++) {
-+            if (virStorageSourceParseBackingJSONInetSocketAddress(src->hosts + i,
-+                                                                  virJSONValueArrayGet(servers, i)) < 0)
-+                return -1;
-+        }
-+    }
-+
-+    return 0;
-+}
-+
- static int
- virStorageSourceParseBackingJSONRaw(virStorageSource *src,
-                                     virJSONValue *json,
-@@ -1162,6 +1284,7 @@ static const struct virStorageSourceJSONDriverParser jsonParsers[] = {
-     {"sheepdog", false, virStorageSourceParseBackingJSONSheepdog, 0},
-     {"ssh", false, virStorageSourceParseBackingJSONSSH, 0},
-     {"rbd", false, virStorageSourceParseBackingJSONRBD, 0},
-+    {"vitastor", false, virStorageSourceParseBackingJSONVitastor, 0},
-     {"raw", true, virStorageSourceParseBackingJSONRaw, 0},
-     {"nfs", false, virStorageSourceParseBackingJSONNFS, 0},
-     {"vxhs", false, virStorageSourceParseBackingJSONVxHS, 0},
-diff --git a/src/test/test_driver.c b/src/test/test_driver.c
-index 0e93b79922..b4d33f5f56 100644
--- a/src/test/test_driver.c
-+++ b/src/test/test_driver.c
-@@ -7367,6 +7367,7 @@ testStorageVolumeTypeForPool(int pooltype)
-     case VIR_STORAGE_POOL_ISCSI_DIRECT:
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_RBD:
-+    case VIR_STORAGE_POOL_VITASTOR:
-         return VIR_STORAGE_VOL_NETWORK;
-     case VIR_STORAGE_POOL_LOGICAL:
-     case VIR_STORAGE_POOL_DISK:
-diff --git a/tests/storagepoolcapsschemadata/poolcaps-fs.xml b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-index eee75af746..8bd0a57bdd 100644
--- a/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-+++ b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-@@ -204,4 +204,11 @@
-       </enum>
-     </volOptions>
-   </pool>
-+  <pool type='vitastor' supported='no'>
-+    <volOptions>
-+      <defaultFormat type='raw'/>
-+      <enum name='targetFormatType'>
-+      </enum>
-+    </volOptions>
-+  </pool>
- </storagepoolCapabilities>
-diff --git a/tests/storagepoolcapsschemadata/poolcaps-full.xml b/tests/storagepoolcapsschemadata/poolcaps-full.xml
-index 805950a937..852df0de16 100644
--- a/tests/storagepoolcapsschemadata/poolcaps-full.xml
-+++ b/tests/storagepoolcapsschemadata/poolcaps-full.xml
-@@ -204,4 +204,11 @@
-       </enum>
-     </volOptions>
-   </pool>
-+  <pool type='vitastor' supported='yes'>
-+    <volOptions>
-+      <defaultFormat type='raw'/>
-+      <enum name='targetFormatType'>
-+      </enum>
-+    </volOptions>
-+  </pool>
- </storagepoolCapabilities>
-diff --git a/tests/storagepoolxml2argvtest.c b/tests/storagepoolxml2argvtest.c
-index 449b745519..7f95cc8e08 100644
--- a/tests/storagepoolxml2argvtest.c
-+++ b/tests/storagepoolxml2argvtest.c
-@@ -68,6 +68,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_ZFS:
-     case VIR_STORAGE_POOL_VSTORAGE:
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_LAST:
-     default:
-         VIR_TEST_DEBUG("pool type '%s' has no xml2argv test", defTypeStr);
-diff --git a/tools/virsh-pool.c b/tools/virsh-pool.c
-index d391257f6e..46799c4a90 100644
--- a/tools/virsh-pool.c
-+++ b/tools/virsh-pool.c
-@@ -1213,6 +1213,9 @@ cmdPoolList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
-             case VIR_STORAGE_POOL_VSTORAGE:
-                 flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE;
-                 break;
-+            case VIR_STORAGE_POOL_VITASTOR:
-+                flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR;
-+                break;
-             case VIR_STORAGE_POOL_LAST:
-                 break;
-             }
@@ -1,643 +0,0 @@
-commit c1cd026e211e94b120028e7c98a6e4ce5afe9846
-Author: Vitaliy Filippov <vitalif@yourcmc.ru>
-Date:   Wed Jan 24 22:04:50 2024 +0300
-
-    Add Vitastor support
-
-diff --git a/include/libvirt/libvirt-storage.h b/include/libvirt/libvirt-storage.h
-index aaad4a3da1..5f5daa8341 100644
--- a/include/libvirt/libvirt-storage.h
-+++ b/include/libvirt/libvirt-storage.h
-@@ -326,6 +326,7 @@ typedef enum {
-     VIR_CONNECT_LIST_STORAGE_POOLS_ZFS           = 1 << 17, /* (Since: 1.2.8) */
-     VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE      = 1 << 18, /* (Since: 3.1.0) */
-     VIR_CONNECT_LIST_STORAGE_POOLS_ISCSI_DIRECT  = 1 << 19, /* (Since: 5.6.0) */
-+    VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR      = 1 << 20, /* (Since: 5.0.0) */
- } virConnectListAllStoragePoolsFlags;
- 
- int                     virConnectListAllStoragePools(virConnectPtr conn,
-diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
-index 22ad43e1d7..56c81d6852 100644
--- a/src/conf/domain_conf.c
-+++ b/src/conf/domain_conf.c
-@@ -7185,7 +7185,8 @@ virDomainDiskSourceNetworkParse(xmlNodePtr node,
-     src->configFile = virXPathString("string(./config/@file)", ctxt);
- 
-     if (src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP ||
-        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS)
-+        src->protocol == VIR_STORAGE_NET_PROTOCOL_HTTPS ||
-+        src->protocol == VIR_STORAGE_NET_PROTOCOL_VITASTOR)
-         src->query = virXMLPropString(node, "query");
- 
-     if (virDomainStorageNetworkParseHosts(node, ctxt, &src->hosts, &src->nhosts) < 0)
-@@ -30618,6 +30619,7 @@ virDomainStorageSourceTranslateSourcePool(virStorageSource *src,
- 
-     case VIR_STORAGE_POOL_MPATH:
-     case VIR_STORAGE_POOL_RBD:
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_SHEEPDOG:
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_LAST:
-diff --git a/src/conf/domain_validate.c b/src/conf/domain_validate.c
-index c72108886e..c739ed6c43 100644
--- a/src/conf/domain_validate.c
-+++ b/src/conf/domain_validate.c
-@@ -495,6 +495,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-@@ -541,7 +542,7 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
-         }
-     }
- 
-    /* internal snapshots and config files are currently supported only with rbd: */
-+    /* internal snapshots are currently supported only with rbd: */
-     if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
-         src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD) {
-         if (src->snapshot) {
-@@ -549,10 +550,15 @@ virDomainDiskDefValidateSourceChainOne(const virStorageSource *src)
-                            _("<snapshot> element is currently supported only with 'rbd' disks"));
-             return -1;
-         }
-+    }
- 
-+    /* config files are currently supported only with rbd and vitastor: */
-+    if (virStorageSourceGetActualType(src) != VIR_STORAGE_TYPE_NETWORK &&
-+        src->protocol != VIR_STORAGE_NET_PROTOCOL_RBD &&
-+        src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR) {
-         if (src->configFile) {
-             virReportError(VIR_ERR_XML_ERROR, "%s",
-                           _("<config> element is currently supported only with 'rbd' disks"));
-+                           _("<config> element is currently supported only with 'rbd' and 'vitastor' disks"));
-             return -1;
-         }
-     }
-diff --git a/src/conf/schemas/domaincommon.rng b/src/conf/schemas/domaincommon.rng
-index b98a2ae602..7d7a872e01 100644
--- a/src/conf/schemas/domaincommon.rng
-+++ b/src/conf/schemas/domaincommon.rng
-@@ -1997,6 +1997,35 @@
-     </element>
-   </define>
- 
-+  <define name="diskSourceNetworkProtocolVitastor">
-+    <element name="source">
-+      <interleave>
-+        <attribute name="protocol">
-+          <value>vitastor</value>
-+        </attribute>
-+        <ref name="diskSourceCommon"/>
-+        <optional>
-+          <attribute name="name"/>
-+        </optional>
-+        <optional>
-+          <attribute name="query"/>
-+        </optional>
-+        <zeroOrMore>
-+          <ref name="diskSourceNetworkHost"/>
-+        </zeroOrMore>
-+        <optional>
-+          <element name="config">
-+            <attribute name="file">
-+              <ref name="absFilePath"/>
-+            </attribute>
-+            <empty/>
-+          </element>
-+        </optional>
-+        <empty/>
-+      </interleave>
-+    </element>
-+  </define>
-+
-   <define name="diskSourceNetworkProtocolISCSI">
-     <element name="source">
-       <attribute name="protocol">
-@@ -2347,6 +2376,7 @@
-       <ref name="diskSourceNetworkProtocolSimple"/>
-       <ref name="diskSourceNetworkProtocolVxHS"/>
-       <ref name="diskSourceNetworkProtocolNFS"/>
-+      <ref name="diskSourceNetworkProtocolVitastor"/>
-     </choice>
-   </define>
- 
-diff --git a/src/conf/storage_conf.c b/src/conf/storage_conf.c
-index 68842004b7..1d69a788b6 100644
--- a/src/conf/storage_conf.c
-+++ b/src/conf/storage_conf.c
-@@ -56,7 +56,7 @@ VIR_ENUM_IMPL(virStoragePool,
-               "logical", "disk", "iscsi",
-               "iscsi-direct", "scsi", "mpath",
-               "rbd", "sheepdog", "gluster",
-              "zfs", "vstorage",
-+              "zfs", "vstorage", "vitastor",
- );
- 
- VIR_ENUM_IMPL(virStoragePoolFormatFileSystem,
-@@ -242,6 +242,18 @@ static virStoragePoolTypeInfo poolTypeInfo[] = {
-           .formatToString = virStorageFileFormatTypeToString,
-       }
-     },
-+    {.poolType = VIR_STORAGE_POOL_VITASTOR,
-+     .poolOptions = {
-+         .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
-+                   VIR_STORAGE_POOL_SOURCE_NETWORK |
-+                   VIR_STORAGE_POOL_SOURCE_NAME),
-+      },
-+      .volOptions = {
-+          .defaultFormat = VIR_STORAGE_FILE_RAW,
-+          .formatFromString = virStorageVolumeFormatFromString,
-+          .formatToString = virStorageFileFormatTypeToString,
-+      }
-+    },
-     {.poolType = VIR_STORAGE_POOL_SHEEPDOG,
-      .poolOptions = {
-          .flags = (VIR_STORAGE_POOL_SOURCE_HOST |
-@@ -538,6 +550,11 @@ virStoragePoolDefParseSource(xmlXPathContextPtr ctxt,
-                        _("element 'name' is mandatory for RBD pool"));
-         return -1;
-     }
-+    if (pool_type == VIR_STORAGE_POOL_VITASTOR && source->name == NULL) {
-+        virReportError(VIR_ERR_XML_ERROR, "%s",
-+                       _("element 'name' is mandatory for Vitastor pool"));
-+        return -1;
-+    }
- 
-     if (options->formatFromString) {
-         g_autofree char *format = NULL;
-@@ -1127,6 +1144,7 @@ virStoragePoolDefFormatBuf(virBuffer *buf,
-     /* RBD, Sheepdog, Gluster and Iscsi-direct devices are not local block devs nor
-      * files, so they don't have a target */
-     if (def->type != VIR_STORAGE_POOL_RBD &&
-+        def->type != VIR_STORAGE_POOL_VITASTOR &&
-         def->type != VIR_STORAGE_POOL_SHEEPDOG &&
-         def->type != VIR_STORAGE_POOL_GLUSTER &&
-         def->type != VIR_STORAGE_POOL_ISCSI_DIRECT) {
-diff --git a/src/conf/storage_conf.h b/src/conf/storage_conf.h
-index fc67957cfe..720c07ef74 100644
--- a/src/conf/storage_conf.h
-+++ b/src/conf/storage_conf.h
-@@ -103,6 +103,7 @@ typedef enum {
-     VIR_STORAGE_POOL_GLUSTER,  /* Gluster device */
-     VIR_STORAGE_POOL_ZFS,      /* ZFS */
-     VIR_STORAGE_POOL_VSTORAGE, /* Virtuozzo Storage */
-+    VIR_STORAGE_POOL_VITASTOR, /* Vitastor */
- 
-     VIR_STORAGE_POOL_LAST,
- } virStoragePoolType;
-@@ -454,6 +455,7 @@ VIR_ENUM_DECL(virStoragePartedFs);
-                  VIR_CONNECT_LIST_STORAGE_POOLS_SCSI     | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_MPATH    | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_RBD      | \
-+                 VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER  | \
-                  VIR_CONNECT_LIST_STORAGE_POOLS_ZFS      | \
-diff --git a/src/conf/storage_source_conf.c b/src/conf/storage_source_conf.c
-index f974a521b1..cd394d0a9f 100644
--- a/src/conf/storage_source_conf.c
-+++ b/src/conf/storage_source_conf.c
-@@ -88,6 +88,7 @@ VIR_ENUM_IMPL(virStorageNetProtocol,
-               "ssh",
-               "vxhs",
-               "nfs",
-+              "vitastor",
- );
- 
- 
-@@ -1301,6 +1302,7 @@ virStorageSourceNetworkDefaultPort(virStorageNetProtocol protocol)
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-             return 24007;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-             /* we don't provide a default for RBD */
-             return 0;
-diff --git a/src/conf/storage_source_conf.h b/src/conf/storage_source_conf.h
-index 5e7d127453..283709eeb3 100644
--- a/src/conf/storage_source_conf.h
-+++ b/src/conf/storage_source_conf.h
-@@ -129,6 +129,7 @@ typedef enum {
-     VIR_STORAGE_NET_PROTOCOL_SSH,
-     VIR_STORAGE_NET_PROTOCOL_VXHS,
-     VIR_STORAGE_NET_PROTOCOL_NFS,
-+    VIR_STORAGE_NET_PROTOCOL_VITASTOR,
- 
-     VIR_STORAGE_NET_PROTOCOL_LAST
- } virStorageNetProtocol;
-diff --git a/src/conf/virstorageobj.c b/src/conf/virstorageobj.c
-index 59fa5da372..4739167f5f 100644
--- a/src/conf/virstorageobj.c
-+++ b/src/conf/virstorageobj.c
-@@ -1438,6 +1438,7 @@ virStoragePoolObjSourceFindDuplicateCb(const void *payload,
-             return 1;
-         break;
- 
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_ISCSI_DIRECT:
-     case VIR_STORAGE_POOL_RBD:
-     case VIR_STORAGE_POOL_LAST:
-@@ -1921,6 +1922,8 @@ virStoragePoolObjMatch(virStoragePoolObj *obj,
-                (obj->def->type == VIR_STORAGE_POOL_MPATH))   ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_RBD) &&
-                (obj->def->type == VIR_STORAGE_POOL_RBD))     ||
-+              (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR) &&
-+               (obj->def->type == VIR_STORAGE_POOL_VITASTOR)) ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG) &&
-                (obj->def->type == VIR_STORAGE_POOL_SHEEPDOG)) ||
-               (MATCH(VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER) &&
-diff --git a/src/libvirt-storage.c b/src/libvirt-storage.c
-index db7660aac4..561df34709 100644
--- a/src/libvirt-storage.c
-+++ b/src/libvirt-storage.c
-@@ -94,6 +94,7 @@ virStoragePoolGetConnect(virStoragePoolPtr pool)
-  * VIR_CONNECT_LIST_STORAGE_POOLS_SCSI
-  * VIR_CONNECT_LIST_STORAGE_POOLS_MPATH
-  * VIR_CONNECT_LIST_STORAGE_POOLS_RBD
-+ * VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR
-  * VIR_CONNECT_LIST_STORAGE_POOLS_SHEEPDOG
-  * VIR_CONNECT_LIST_STORAGE_POOLS_GLUSTER
-  * VIR_CONNECT_LIST_STORAGE_POOLS_ZFS
-diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c
-index 62e1be6672..71a1d42896 100644
--- a/src/libxl/libxl_conf.c
-+++ b/src/libxl/libxl_conf.c
-@@ -979,6 +979,7 @@ libxlMakeNetworkDiskSrcStr(virStorageSource *src,
-     case VIR_STORAGE_NET_PROTOCOL_SSH:
-     case VIR_STORAGE_NET_PROTOCOL_VXHS:
-     case VIR_STORAGE_NET_PROTOCOL_NFS:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-         virReportError(VIR_ERR_NO_SUPPORT,
-diff --git a/src/libxl/xen_xl.c b/src/libxl/xen_xl.c
-index f175359307..8efcf4c329 100644
--- a/src/libxl/xen_xl.c
-+++ b/src/libxl/xen_xl.c
-@@ -1456,6 +1456,7 @@ xenFormatXLDiskSrcNet(virStorageSource *src)
-     case VIR_STORAGE_NET_PROTOCOL_SSH:
-     case VIR_STORAGE_NET_PROTOCOL_VXHS:
-     case VIR_STORAGE_NET_PROTOCOL_NFS:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-         virReportError(VIR_ERR_NO_SUPPORT,
-diff --git a/src/qemu/qemu_block.c b/src/qemu/qemu_block.c
-index 7e9daf0bdc..825b4a3006 100644
--- a/src/qemu/qemu_block.c
-+++ b/src/qemu/qemu_block.c
-@@ -758,6 +758,38 @@ qemuBlockStorageSourceGetRBDProps(virStorageSource *src,
- }
- 
- 
-+static virJSONValue *
-+qemuBlockStorageSourceGetVitastorProps(virStorageSource *src)
-+{
-+    virJSONValue *ret = NULL;
-+    virStorageNetHostDef *host;
-+    size_t i;
-+    g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
-+    g_autofree char *etcd = NULL;
-+
-+    for (i = 0; i < src->nhosts; i++) {
-+        host = src->hosts + i;
-+        if ((virStorageNetHostTransport)host->transport != VIR_STORAGE_NET_HOST_TRANS_TCP) {
-+            return NULL;
-+        }
-+        virBufferAsprintf(&buf, i > 0 ? ",%s:%u" : "%s:%u", host->name, host->port);
-+    }
-+    if (src->nhosts > 0) {
-+        etcd = virBufferContentAndReset(&buf);
-+    }
-+
-+    if (virJSONValueObjectAdd(&ret,
-+                              "S:etcd-host", etcd,
-+                              "S:etcd-prefix", src->query,
-+                              "S:config-path", src->configFile,
-+                              "s:image", src->path,
-+                              NULL) < 0)
-+        return NULL;
-+
-+    return ret;
-+}
-+
-+
- static virJSONValue *
- qemuBlockStorageSourceGetSheepdogProps(virStorageSource *src)
- {
-@@ -1140,6 +1172,12 @@ qemuBlockStorageSourceGetBackendProps(virStorageSource *src,
-                 return NULL;
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+            driver = "vitastor";
-+            if (!(fileprops = qemuBlockStorageSourceGetVitastorProps(src)))
-+                return NULL;
-+            break;
-+
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             driver = "sheepdog";
-             if (!(fileprops = qemuBlockStorageSourceGetSheepdogProps(src)))
-@@ -2032,6 +2070,7 @@ qemuBlockGetBackingStoreString(virStorageSource *src,
- 
-             case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             case VIR_STORAGE_NET_PROTOCOL_RBD:
-+            case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-             case VIR_STORAGE_NET_PROTOCOL_VXHS:
-             case VIR_STORAGE_NET_PROTOCOL_NFS:
-             case VIR_STORAGE_NET_PROTOCOL_SSH:
-@@ -2415,6 +2454,12 @@ qemuBlockStorageSourceCreateGetStorageProps(virStorageSource *src,
-                 return -1;
-             break;
- 
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+            driver = "vitastor";
-+            if (!(location = qemuBlockStorageSourceGetVitastorProps(src)))
-+                return -1;
-+            break;
-+
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-             driver = "sheepdog";
-             if (!(location = qemuBlockStorageSourceGetSheepdogProps(src)))
-diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
-index 953808fcfe..62860283d8 100644
--- a/src/qemu/qemu_domain.c
-+++ b/src/qemu/qemu_domain.c
-@@ -5215,7 +5215,8 @@ qemuDomainValidateStorageSource(virStorageSource *src,
-     if (src->query &&
-         (actualType != VIR_STORAGE_TYPE_NETWORK ||
-          (src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTPS &&
-          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP))) {
-+          src->protocol != VIR_STORAGE_NET_PROTOCOL_HTTP &&
-+          src->protocol != VIR_STORAGE_NET_PROTOCOL_VITASTOR))) {
-         virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s",
-                        _("query is supported only with HTTP(S) protocols"));
-         return -1;
-@@ -10340,6 +10341,7 @@ qemuDomainPrepareStorageSourceTLS(virStorageSource *src,
-         break;
- 
-     case VIR_STORAGE_NET_PROTOCOL_RBD:
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-     case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-     case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-diff --git a/src/qemu/qemu_snapshot.c b/src/qemu/qemu_snapshot.c
-index 73ff533827..e9c799ca8f 100644
--- a/src/qemu/qemu_snapshot.c
-+++ b/src/qemu/qemu_snapshot.c
-@@ -423,6 +423,7 @@ qemuSnapshotPrepareDiskExternalInactive(virDomainSnapshotDiskDef *snapdisk,
-         case VIR_STORAGE_NET_PROTOCOL_NONE:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-@@ -648,6 +649,7 @@ qemuSnapshotPrepareDiskInternal(virDomainDiskDef *disk,
-         case VIR_STORAGE_NET_PROTOCOL_NONE:
-         case VIR_STORAGE_NET_PROTOCOL_NBD:
-         case VIR_STORAGE_NET_PROTOCOL_RBD:
-+        case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-         case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-         case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
-         case VIR_STORAGE_NET_PROTOCOL_ISCSI:
-diff --git a/src/storage/storage_driver.c b/src/storage/storage_driver.c
-index 314fe930e0..fb615a8b4e 100644
--- a/src/storage/storage_driver.c
-+++ b/src/storage/storage_driver.c
-@@ -1626,6 +1626,7 @@ storageVolLookupByPathCallback(virStoragePoolObj *obj,
- 
-         case VIR_STORAGE_POOL_GLUSTER:
-         case VIR_STORAGE_POOL_RBD:
-+        case VIR_STORAGE_POOL_VITASTOR:
-         case VIR_STORAGE_POOL_SHEEPDOG:
-         case VIR_STORAGE_POOL_ZFS:
-         case VIR_STORAGE_POOL_LAST:
-diff --git a/src/storage_file/storage_source_backingstore.c b/src/storage_file/storage_source_backingstore.c
-index 80681924ea..8a3ade9ec0 100644
--- a/src/storage_file/storage_source_backingstore.c
-+++ b/src/storage_file/storage_source_backingstore.c
-@@ -287,6 +287,75 @@ virStorageSourceParseRBDColonString(const char *rbdstr,
- }
- 
- 
-+static int
-+virStorageSourceParseVitastorColonString(const char *colonstr,
-+                                         virStorageSource *src)
-+{
-+    char *p, *e, *next;
-+    g_autofree char *options = NULL;
-+
-+    /* optionally skip the "vitastor:" prefix if provided */
-+    if (STRPREFIX(colonstr, "vitastor:"))
-+        colonstr += strlen("vitastor:");
-+
-+    options = g_strdup(colonstr);
-+
-+    p = options;
-+    while (*p) {
-+        /* find : delimiter or end of string */
-+        for (e = p; *e && *e != ':'; ++e) {
-+            if (*e == '\\') {
-+                e++;
-+                if (*e == '\0')
-+                    break;
-+            }
-+        }
-+        if (*e == '\0') {
-+            next = e;    /* last kv pair */
-+        } else {
-+            next = e + 1;
-+            *e = '\0';
-+        }
-+
-+        if (STRPREFIX(p, "image=")) {
-+            src->path = g_strdup(p + strlen("image="));
-+        } else if (STRPREFIX(p, "etcd-prefix=")) {
-+            src->query = g_strdup(p + strlen("etcd-prefix="));
-+        } else if (STRPREFIX(p, "config-path=")) {
-+            src->configFile = g_strdup(p + strlen("config-path="));
-+        } else if (STRPREFIX(p, "etcd-host=")) {
-+            char *h, *sep;
-+
-+            h = p + strlen("etcd-host=");
-+            while (h < e) {
-+                for (sep = h; sep < e; ++sep) {
-+                    if (*sep == '\\' && (sep[1] == ',' ||
-+                                         sep[1] == ';' ||
-+                                         sep[1] == ' ')) {
-+                        *sep = '\0';
-+                        sep += 2;
-+                        break;
-+                    }
-+                }
-+
-+                if (virStorageSourceRBDAddHost(src, h) < 0)
-+                    return -1;
-+
-+                h = sep;
-+            }
-+        }
-+
-+        p = next;
-+    }
-+
-+    if (!src->path) {
-+        return -1;
-+    }
-+
-+    return 0;
-+}
-+
-+
- static int
- virStorageSourceParseNBDColonString(const char *nbdstr,
-                                     virStorageSource *src)
-@@ -399,6 +468,11 @@ virStorageSourceParseBackingColon(virStorageSource *src,
-             return -1;
-         break;
- 
-+    case VIR_STORAGE_NET_PROTOCOL_VITASTOR:
-+        if (virStorageSourceParseVitastorColonString(path, src) < 0)
-+            return -1;
-+        break;
-+
-     case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
-     case VIR_STORAGE_NET_PROTOCOL_LAST:
-     case VIR_STORAGE_NET_PROTOCOL_NONE:
-@@ -975,6 +1049,54 @@ virStorageSourceParseBackingJSONRBD(virStorageSource *src,
-     return 0;
- }
- 
-+static int
-+virStorageSourceParseBackingJSONVitastor(virStorageSource *src,
-+                                         virJSONValue *json,
-+                                         const char *jsonstr G_GNUC_UNUSED,
-+                                         int opaque G_GNUC_UNUSED)
-+{
-+    const char *filename;
-+    const char *image = virJSONValueObjectGetString(json, "image");
-+    const char *conf = virJSONValueObjectGetString(json, "config-path");
-+    const char *etcd_prefix = virJSONValueObjectGetString(json, "etcd-prefix");
-+    virJSONValue *servers = virJSONValueObjectGetArray(json, "server");
-+    size_t nservers;
-+    size_t i;
-+
-+    src->type = VIR_STORAGE_TYPE_NETWORK;
-+    src->protocol = VIR_STORAGE_NET_PROTOCOL_VITASTOR;
-+
-+    /* legacy syntax passed via 'filename' option */
-+    if ((filename = virJSONValueObjectGetString(json, "filename")))
-+        return virStorageSourceParseVitastorColonString(filename, src);
-+
-+    if (!image) {
-+        virReportError(VIR_ERR_INVALID_ARG, "%s",
-+                       _("missing image name in Vitastor backing volume "
-+                         "JSON specification"));
-+        return -1;
-+    }
-+
-+    src->path = g_strdup(image);
-+    src->configFile = g_strdup(conf);
-+    src->query = g_strdup(etcd_prefix);
-+
-+    if (servers) {
-+        nservers = virJSONValueArraySize(servers);
-+
-+        src->hosts = g_new0(virStorageNetHostDef, nservers);
-+        src->nhosts = nservers;
-+
-+        for (i = 0; i < nservers; i++) {
-+            if (virStorageSourceParseBackingJSONInetSocketAddress(src->hosts + i,
-+                                                                  virJSONValueArrayGet(servers, i)) < 0)
-+                return -1;
-+        }
-+    }
-+
-+    return 0;
-+}
-+
- static int
- virStorageSourceParseBackingJSONRaw(virStorageSource *src,
-                                     virJSONValue *json,
-@@ -1152,6 +1274,7 @@ static const struct virStorageSourceJSONDriverParser jsonParsers[] = {
-     {"sheepdog", false, virStorageSourceParseBackingJSONSheepdog, 0},
-     {"ssh", false, virStorageSourceParseBackingJSONSSH, 0},
-     {"rbd", false, virStorageSourceParseBackingJSONRBD, 0},
-+    {"vitastor", false, virStorageSourceParseBackingJSONVitastor, 0},
-     {"raw", true, virStorageSourceParseBackingJSONRaw, 0},
-     {"nfs", false, virStorageSourceParseBackingJSONNFS, 0},
-     {"vxhs", false, virStorageSourceParseBackingJSONVxHS, 0},
-diff --git a/src/test/test_driver.c b/src/test/test_driver.c
-index e87d7cfd44..ccc05d7aae 100644
--- a/src/test/test_driver.c
-+++ b/src/test/test_driver.c
-@@ -7335,6 +7335,7 @@ testStorageVolumeTypeForPool(int pooltype)
-     case VIR_STORAGE_POOL_ISCSI_DIRECT:
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_RBD:
-+    case VIR_STORAGE_POOL_VITASTOR:
-         return VIR_STORAGE_VOL_NETWORK;
-     case VIR_STORAGE_POOL_LOGICAL:
-     case VIR_STORAGE_POOL_DISK:
-diff --git a/tests/storagepoolcapsschemadata/poolcaps-fs.xml b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-index eee75af746..8bd0a57bdd 100644
--- a/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-+++ b/tests/storagepoolcapsschemadata/poolcaps-fs.xml
-@@ -204,4 +204,11 @@
-       </enum>
-     </volOptions>
-   </pool>
-+  <pool type='vitastor' supported='no'>
-+    <volOptions>
-+      <defaultFormat type='raw'/>
-+      <enum name='targetFormatType'>
-+      </enum>
-+    </volOptions>
-+  </pool>
- </storagepoolCapabilities>
-diff --git a/tests/storagepoolcapsschemadata/poolcaps-full.xml b/tests/storagepoolcapsschemadata/poolcaps-full.xml
-index 805950a937..852df0de16 100644
--- a/tests/storagepoolcapsschemadata/poolcaps-full.xml
-+++ b/tests/storagepoolcapsschemadata/poolcaps-full.xml
-@@ -204,4 +204,11 @@
-       </enum>
-     </volOptions>
-   </pool>
-+  <pool type='vitastor' supported='yes'>
-+    <volOptions>
-+      <defaultFormat type='raw'/>
-+      <enum name='targetFormatType'>
-+      </enum>
-+    </volOptions>
-+  </pool>
- </storagepoolCapabilities>
-diff --git a/tests/storagepoolxml2argvtest.c b/tests/storagepoolxml2argvtest.c
-index e8e40d695e..db55fe5f3a 100644
--- a/tests/storagepoolxml2argvtest.c
-+++ b/tests/storagepoolxml2argvtest.c
-@@ -65,6 +65,7 @@ testCompareXMLToArgvFiles(bool shouldFail,
-     case VIR_STORAGE_POOL_GLUSTER:
-     case VIR_STORAGE_POOL_ZFS:
-     case VIR_STORAGE_POOL_VSTORAGE:
-+    case VIR_STORAGE_POOL_VITASTOR:
-     case VIR_STORAGE_POOL_LAST:
-     default:
-         VIR_TEST_DEBUG("pool type '%s' has no xml2argv test", defTypeStr);
-diff --git a/tools/virsh-pool.c b/tools/virsh-pool.c
-index 36f00cf643..5f5bd3464e 100644
--- a/tools/virsh-pool.c
-+++ b/tools/virsh-pool.c
-@@ -1223,6 +1223,9 @@ cmdPoolList(vshControl *ctl, const vshCmd *cmd G_GNUC_UNUSED)
-             case VIR_STORAGE_POOL_VSTORAGE:
-                 flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VSTORAGE;
-                 break;
-+            case VIR_STORAGE_POOL_VITASTOR:
-+                flags |= VIR_CONNECT_LIST_STORAGE_POOLS_VITASTOR;
-+                break;
-             case VIR_STORAGE_POOL_LAST:
-                 break;
-             }
@@ -1,28 +0,0 @@
-name: Pull Request
-about: Submit a pull request
-body:
-  - type: textarea
-    id: description
-    attributes:
-      label: Description
-      description: Describe your pull request
-      placeholder: ""
-      value: ""
-    validations:
-      required: true
-  - type: input
-    id: author
-    attributes:
-      label: Contributor Name
-      description: Contributor Name or Company Details if the Contributor is a company
-      placeholder: ""
-    validations:
-      required: false
-  - type: checkboxes
-    id: terms
-    attributes:
-      label: CLA
-      description: By submitting this pull request, I accept [Vitastor CLA](https://git.yourcmc.ru/vitalif/vitastor/src/branch/master/CLA-en.md)
-      options:
-        - label: "I accept Vitastor CLA agreement: https://git.yourcmc.ru/vitalif/vitastor/src/branch/master/CLA-en.md"
-          required: true
@@ -24,4 +24,4 @@ rm fio
 mv fio-copy fio
 FIO=`rpm -qi fio | perl -e 'while(<>) { /^Epoch[\s:]+(\S+)/ && print "$1:"; /^Version[\s:]+(\S+)/ && print $1; /^Release[\s:]+(\S+)/ && print "-$1"; }'`
 perl -i -pe 's/(Requires:\s*fio)([^\n]+)?/$1 = '$FIO'/' $VITASTOR/rpm/vitastor-el$EL.spec
-tar --transform 's#^#vitastor-1.4.8/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-1.4.8$(rpm --eval '%dist').tar.gz *
+tar --transform 's#^#vitastor-1.3.1/#' --exclude 'rpm/*.rpm' -czf $VITASTOR/../vitastor-1.3.1$(rpm --eval '%dist').tar.gz *
@@ -36,7 +36,7 @@ ADD . /root/vitastor
 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-1.4.8.el7.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-1.3.1.el7.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el7.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        1.4.8
+Version:        1.3.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage

 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-1.4.8.el7.tar.gz
+Source0:        vitastor-1.3.1.el7.tar.gz

 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -35,7 +35,7 @@ ADD . /root/vitastor
 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-1.4.8.el8.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-1.3.1.el8.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el8.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        1.4.8
+Version:        1.3.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage

 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-1.4.8.el8.tar.gz
+Source0:        vitastor-1.3.1.el8.tar.gz

 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -18,7 +18,7 @@ ADD . /root/vitastor
 RUN set -e; \
    cd /root/vitastor/rpm; \
    sh build-tarball.sh; \
-    cp /root/vitastor-1.4.8.el9.tar.gz ~/rpmbuild/SOURCES; \
+    cp /root/vitastor-1.3.1.el9.tar.gz ~/rpmbuild/SOURCES; \
    cp vitastor-el9.spec ~/rpmbuild/SPECS/vitastor.spec; \
    cd ~/rpmbuild/SPECS/; \
    rpmbuild -ba vitastor.spec; \
@@ -1,11 +1,11 @@
 Name:           vitastor
-Version:        1.4.8
+Version:        1.3.1
 Release:        1%{?dist}
 Summary:        Vitastor, a fast software-defined clustered block storage

 License:        Vitastor Network Public License 1.1
 URL:            https://vitastor.io/
-Source0:        vitastor-1.4.8.el9.tar.gz
+Source0:        vitastor-1.3.1.el9.tar.gz

 BuildRequires:  liburing-devel >= 0.6
 BuildRequires:  gperftools-devel
@@ -16,8 +16,8 @@ if("${CMAKE_INSTALL_PREFIX}" MATCHES "^/usr/local/?$")
 	set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_PREFIX}/${CMAKE_INSTALL_LIBDIR}")
 endif()

-add_definitions(-DVERSION="1.4.8")
-add_definitions(-D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64 -Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -fno-omit-frame-pointer -I ${CMAKE_SOURCE_DIR}/src)
+add_definitions(-DVERSION="1.3.1")
+add_definitions(-Wall -Wno-sign-compare -Wno-comment -Wno-parentheses -Wno-pointer-arith -fdiagnostics-color=always -fno-omit-frame-pointer -I ${CMAKE_SOURCE_DIR}/src)
 add_link_options(-fno-omit-frame-pointer)
 if (${WITH_ASAN})
 	add_definitions(-fsanitize=address)
@@ -181,6 +181,25 @@ target_link_libraries(vitastor-nbd
 	vitastor_client
 )

+# vitastor-kv
+add_executable(vitastor-kv
+	kv_cli.cpp
+	kv_db.cpp
+	kv_db.h
+)
+target_link_libraries(vitastor-kv
+	vitastor_client
+)
+
+add_executable(vitastor-kv-stress
+	kv_stress.cpp
+	kv_db.cpp
+	kv_db.h
+)
+target_link_libraries(vitastor-kv-stress
+	vitastor_client
+)
+
 # vitastor-nfs
 add_executable(vitastor-nfs
 	nfs_proxy.cpp
@@ -108,10 +108,6 @@ void blockstore_disk_t::parse_config(std::map<std::string, std::string> & config
    {
        throw std::runtime_error("journal_block_size must be a multiple of "+std::to_string(DIRECT_IO_ALIGNMENT));
    }
-    else if (journal_block_size > MAX_DATA_BLOCK_SIZE)
-    {
-        throw std::runtime_error("journal_block_size must not exceed "+std::to_string(MAX_DATA_BLOCK_SIZE));
-    }
    if (!meta_block_size)
    {
        meta_block_size = 4096;
@@ -120,10 +116,6 @@ void blockstore_disk_t::parse_config(std::map<std::string, std::string> & config
    {
        throw std::runtime_error("meta_block_size must be a multiple of "+std::to_string(DIRECT_IO_ALIGNMENT));
    }
-    else if (meta_block_size > MAX_DATA_BLOCK_SIZE)
-    {
-        throw std::runtime_error("meta_block_size must not exceed "+std::to_string(MAX_DATA_BLOCK_SIZE));
-    }
    if (data_offset % disk_alignment)
    {
        throw std::runtime_error("data_offset must be a multiple of disk_alignment = "+std::to_string(disk_alignment));
@@ -19,6 +19,7 @@ journal_flusher_t::journal_flusher_t(blockstore_impl_t *bs)
    syncing_flushers = 0;
    // FIXME: allow to configure flusher_start_threshold and journal_trim_interval
    flusher_start_threshold = bs->dsk.journal_block_size / sizeof(journal_entry_stable);
+    journal_trim_interval = 512;
    journal_trim_counter = bs->journal.flush_journal ? 1 : 0;
    trim_wanted = bs->journal.flush_journal ? 1 : 0;
    journal_superblock = bs->journal.inmemory ? bs->journal.buffer : memalign_or_die(MEM_ALIGNMENT, bs->dsk.journal_block_size);
@@ -93,7 +94,7 @@ void journal_flusher_t::loop()
 void journal_flusher_t::enqueue_flush(obj_ver_id ov)
 {
 #ifdef BLOCKSTORE_DEBUG
-    printf("enqueue_flush %jx:%jx v%ju\n", ov.oid.inode, ov.oid.stripe, ov.version);
+    printf("enqueue_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
 #endif
    auto it = flush_versions.find(ov.oid);
    if (it != flush_versions.end())
@@ -116,7 +117,7 @@ void journal_flusher_t::enqueue_flush(obj_ver_id ov)
 void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
 {
 #ifdef BLOCKSTORE_DEBUG
-    printf("unshift_flush %jx:%jx v%ju\n", ov.oid.inode, ov.oid.stripe, ov.version);
+    printf("unshift_flush %lx:%lx v%lu\n", ov.oid.inode, ov.oid.stripe, ov.version);
 #endif
    auto it = flush_versions.find(ov.oid);
    if (it != flush_versions.end())
@@ -142,7 +143,7 @@ void journal_flusher_t::unshift_flush(obj_ver_id ov, bool force)
 void journal_flusher_t::remove_flush(object_id oid)
 {
 #ifdef BLOCKSTORE_DEBUG
-    printf("undo_flush %jx:%jx\n", oid.inode, oid.stripe);
+    printf("undo_flush %lx:%lx\n", oid.inode, oid.stripe);
 #endif
    auto v_it = flush_versions.find(oid);
    if (v_it != flush_versions.end())
@@ -183,7 +184,8 @@ void journal_flusher_t::mark_trim_possible()
    if (trim_wanted > 0)
    {
        dequeuing = true;
-        journal_trim_counter = 0;
+        if (!journal_trim_counter)
+            journal_trim_counter = journal_trim_interval;
        bs->ringloop->wakeup();
    }
 }
@@ -233,7 +235,7 @@ void journal_flusher_t::dump_diagnostics()
        break;
    }
    printf(
-        "Flusher: queued=%zd first=%s%jx:%jx trim_wanted=%d dequeuing=%d trimming=%d cur=%d target=%d active=%d syncing=%d\n",
+        "Flusher: queued=%ld first=%s%lx:%lx trim_wanted=%d dequeuing=%d trimming=%d cur=%d target=%d active=%d syncing=%d\n",
        flush_queue.size(), unflushable_type, unflushable.oid.inode, unflushable.oid.stripe,
        trim_wanted, dequeuing, trimming, cur_flusher_count, target_flusher_count,
        active_flushers, syncing_flushers
@@ -266,7 +268,7 @@ bool journal_flusher_t::try_find_other(std::map<obj_ver_id, dirty_entry>::iterat
 {
    int search_left = flush_queue.size() - 1;
 #ifdef BLOCKSTORE_DEBUG
-    printf("Flusher overran writers (%jx:%jx v%ju, dirty_start=%08jx) - searching for older flushes (%d left)\n",
+    printf("Flusher overran writers (%lx:%lx v%lu, dirty_start=%08lx) - searching for older flushes (%d left)\n",
        cur.oid.inode, cur.oid.stripe, cur.version, bs->journal.dirty_start, search_left);
 #endif
    while (search_left > 0)
@@ -283,7 +285,7 @@ bool journal_flusher_t::try_find_other(std::map<obj_ver_id, dirty_entry>::iterat
                dirty_end->second.journal_sector < bs->journal.used_start))
            {
 #ifdef BLOCKSTORE_DEBUG
-                printf("Write %jx:%jx v%ju is too new: offset=%08jx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
+                printf("Write %lx:%lx v%lu is too new: offset=%08lx\n", cur.oid.inode, cur.oid.stripe, cur.version, dirty_end->second.journal_sector);
 #endif
                enqueue_flush(cur);
            }
@@ -364,10 +366,9 @@ resume_0:
        !flusher->flush_queue.size() || !flusher->dequeuing)
    {
 stop_flusher:
-        if (flusher->trim_wanted > 0 && cur.oid.inode != 0)
+        if (flusher->trim_wanted > 0 && flusher->journal_trim_counter > 0)
        {
            // Attempt forced trim
-            cur.oid = {};
            flusher->active_flushers++;
            goto trim_journal;
        }
@@ -386,7 +387,7 @@ stop_flusher:
        if (repeat_it != flusher->sync_to_repeat.end())
        {
 #ifdef BLOCKSTORE_DEBUG
-            printf("Postpone %jx:%jx v%ju\n", cur.oid.inode, cur.oid.stripe, cur.version);
+            printf("Postpone %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
 #endif
            // We don't flush different parts of history of the same object in parallel
            // So we check if someone is already flushing this object
@@ -415,13 +416,12 @@ stop_flusher:
                flusher->sync_to_repeat.erase(cur.oid);
                if (!flusher->try_find_other(dirty_end, cur))
                {
-                    cur.oid = {};
                    goto stop_flusher;
                }
            }
        }
 #ifdef BLOCKSTORE_DEBUG
-        printf("Flushing %jx:%jx v%ju\n", cur.oid.inode, cur.oid.stripe, cur.version);
+        printf("Flushing %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
 #endif
        flusher->active_flushers++;
        // Find it in clean_db
@@ -448,7 +448,7 @@ stop_flusher:
                // Object not allocated. This is a bug.
                char err[1024];
                snprintf(
-                    err, 1024, "BUG: Object %jx:%jx v%ju that we are trying to flush is not allocated on the data device",
+                    err, 1024, "BUG: Object %lx:%lx v%lu that we are trying to flush is not allocated on the data device",
                    cur.oid.inode, cur.oid.stripe, cur.version
                );
                throw std::runtime_error(err);
@@ -538,7 +538,7 @@ resume_2:
                clean_disk_entry *old_entry = (clean_disk_entry*)((uint8_t*)meta_old.buf + meta_old.pos*bs->dsk.clean_entry_size);
                if (old_entry->oid.inode != 0 && old_entry->oid != cur.oid)
                {
-                    printf("Fatal error (metadata corruption or bug): tried to wipe metadata entry %ju (%jx:%jx v%ju) as old location of %jx:%jx\n",
+                    printf("Fatal error (metadata corruption or bug): tried to wipe metadata entry %lu (%lx:%lx v%lu) as old location of %lx:%lx\n",
                        old_clean_loc >> bs->dsk.block_order, old_entry->oid.inode, old_entry->oid.stripe,
                        old_entry->version, cur.oid.inode, cur.oid.stripe);
                    exit(1);
@@ -571,7 +571,7 @@ resume_2:
        // Erase dirty_db entries
        bs->erase_dirty(dirty_start, std::next(dirty_end), clean_loc);
 #ifdef BLOCKSTORE_DEBUG
-        printf("Flushed %jx:%jx v%ju (%d copies, wr:%d, del:%d), %jd left\n", cur.oid.inode, cur.oid.stripe, cur.version,
+        printf("Flushed %lx:%lx v%lu (%d copies, wr:%d, del:%d), %ld left\n", cur.oid.inode, cur.oid.stripe, cur.version,
            copy_count, has_writes, has_delete, flusher->flush_queue.size());
 #endif
    release_oid:
@@ -584,8 +584,7 @@ resume_2:
        flusher->sync_to_repeat.erase(repeat_it);
    trim_journal:
        // Clear unused part of the journal every <journal_trim_interval> flushes
-        if (bs->journal_trim_interval && !((++flusher->journal_trim_counter) % bs->journal_trim_interval) ||
-            flusher->trim_wanted > 0)
+        if (!((++flusher->journal_trim_counter) % flusher->journal_trim_interval) || flusher->trim_wanted > 0)
        {
    resume_26:
    resume_27:
@@ -610,8 +609,8 @@ void journal_flusher_co::update_metadata_entry()
    {
        printf(
            has_delete
-                ? "Fatal error (metadata corruption or bug): tried to delete metadata entry %ju (%jx:%jx v%ju) while deleting %jx:%jx v%ju\n"
-                : "Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %ju (%jx:%jx v%ju) with %jx:%jx v%ju\n",
+                ? "Fatal error (metadata corruption or bug): tried to delete metadata entry %lu (%lx:%lx v%lu) while deleting %lx:%lx v%lu\n"
+                : "Fatal error (metadata corruption or bug): tried to overwrite non-zero metadata entry %lu (%lx:%lx v%lu) with %lx:%lx v%lu\n",
            clean_loc >> bs->dsk.block_order, new_entry->oid.inode, new_entry->oid.stripe,
            new_entry->version, cur.oid.inode, cur.oid.stripe, cur.version
        );
@@ -711,7 +710,7 @@ bool journal_flusher_co::write_meta_block(flusher_meta_write_t & meta_block, int
    if (wait_state == wait_base)
        goto resume_0;
    await_sqe(0);
-    data->iov = (struct iovec){ meta_block.buf, (size_t)bs->dsk.meta_block_size };
+    data->iov = (struct iovec){ meta_block.buf, bs->dsk.meta_block_size };
    data->callback = simple_callback_w;
    my_uring_prep_writev(
        sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + bs->dsk.meta_block_size + meta_block.sector
@@ -761,7 +760,7 @@ bool journal_flusher_co::clear_incomplete_csum_block_bits(int wait_base)
        {
            // If we encounter bad checksums during flush, we still update the bad block,
            // but intentionally mangle checksums to avoid hiding the corruption.
-            iovec iov = { .iov_base = v[i].buf, .iov_len = (size_t)v[i].len };
+            iovec iov = { .iov_base = v[i].buf, .iov_len = v[i].len };
            if (!(v[i].copy_flags & COPY_BUF_JOURNAL))
            {
                assert(!(v[i].offset % bs->dsk.csum_block_size));
@@ -769,7 +768,7 @@ bool journal_flusher_co::clear_incomplete_csum_block_bits(int wait_base)
                bs->verify_padded_checksums(new_clean_bitmap, new_clean_bitmap + 2*bs->dsk.clean_entry_bitmap_size,
                    v[i].offset, &iov, 1, [&](uint32_t bad_block, uint32_t calc_csum, uint32_t stored_csum)
                {
-                    printf("Checksum mismatch in object %jx:%jx v%ju in data area at offset 0x%jx+0x%x: got %08x, expected %08x\n",
+                    printf("Checksum mismatch in object %lx:%lx v%lu in data area at offset 0x%lx+0x%x: got %08x, expected %08x\n",
                        cur.oid.inode, cur.oid.stripe, old_clean_ver, old_clean_loc, bad_block, calc_csum, stored_csum);
                    for (uint32_t j = 0; j < bs->dsk.csum_block_size; j += bs->dsk.bitmap_granularity)
                    {
@@ -782,7 +781,7 @@ bool journal_flusher_co::clear_incomplete_csum_block_bits(int wait_base)
            {
                bs->verify_journal_checksums(v[i].csum_buf, v[i].offset, &iov, 1, [&](uint32_t bad_block, uint32_t calc_csum, uint32_t stored_csum)
                {
-                    printf("Checksum mismatch in object %jx:%jx v%ju in journal at offset 0x%jx+0x%x (block offset 0x%jx): got %08x, expected %08x\n",
+                    printf("Checksum mismatch in object %lx:%lx v%lu in journal at offset 0x%lx+0x%x (block offset 0x%lx): got %08x, expected %08x\n",
                        cur.oid.inode, cur.oid.stripe, old_clean_ver,
                        v[i].disk_offset, bad_block, v[i].offset, calc_csum, stored_csum);
                    bad_block += (v[i].offset/bs->dsk.csum_block_size) * bs->dsk.csum_block_size;
@@ -806,7 +805,7 @@ bool journal_flusher_co::clear_incomplete_csum_block_bits(int wait_base)
            if (new_entry->oid != cur.oid)
            {
                printf(
-                    "Fatal error (metadata corruption or bug): tried to make holes in %ju (%jx:%jx v%ju) with %jx:%jx v%ju\n",
+                    "Fatal error (metadata corruption or bug): tried to make holes in %lu (%lx:%lx v%lu) with %lx:%lx v%lu\n",
                    clean_loc >> bs->dsk.block_order, new_entry->oid.inode, new_entry->oid.stripe,
                    new_entry->version, cur.oid.inode, cur.oid.stripe, cur.version
                );
@@ -926,7 +925,7 @@ void journal_flusher_co::scan_dirty()
        {
            char err[1024];
            snprintf(
-                err, 1024, "BUG: Unexpected dirty_entry %jx:%jx v%ju unstable state during flush: 0x%x",
+                err, 1024, "BUG: Unexpected dirty_entry %lx:%lx v%lu unstable state during flush: 0x%x",
                dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, dirty_it->second.state
            );
            throw std::runtime_error(err);
@@ -1022,7 +1021,7 @@ void journal_flusher_co::scan_dirty()
            // May happen if the metadata entry is corrupt, but journal isn't
            // FIXME: Report corrupted object to the upper layer (OSD)
            printf(
-                "Warning: object %jx:%jx has overwrites, but doesn't have a clean version."
+                "Warning: object %lx:%lx has overwrites, but doesn't have a clean version."
                " Metadata is likely corrupted. Dropping object from the DB.\n",
                cur.oid.inode, cur.oid.stripe
            );
@@ -1057,7 +1056,7 @@ void journal_flusher_co::scan_dirty()
        flusher->enqueue_flush(cur);
        cur.version = dirty_end->first.version;
 #ifdef BLOCKSTORE_DEBUG
-        printf("Partial checksum block overwrites found - rewinding flush back to %jx:%jx v%ju\n", cur.oid.inode, cur.oid.stripe, cur.version);
+        printf("Partial checksum block overwrites found - rewinding flush back to %lx:%lx v%lu\n", cur.oid.inode, cur.oid.stripe, cur.version);
 #endif
        v.clear();
        copy_count = 0;
@@ -1085,7 +1084,7 @@ bool journal_flusher_co::read_dirty(int wait_base)
        auto & vi = v[v.size()-i];
        assert(vi.len != 0);
        vi.buf = memalign_or_die(MEM_ALIGNMENT, vi.len);
-        data->iov = (struct iovec){ vi.buf, (size_t)vi.len };
+        data->iov = (struct iovec){ vi.buf, vi.len };
        data->callback = simple_callback_r;
        my_uring_prep_readv(
            sqe, bs->dsk.data_fd, &data->iov, 1, bs->dsk.data_offset + old_clean_loc + vi.offset
@@ -1209,7 +1208,7 @@ bool journal_flusher_co::modify_meta_read(uint64_t meta_loc, flusher_meta_write_
            .usage_count = 1,
        }).first;
        await_sqe(0);
-        data->iov = (struct iovec){ wr.it->second.buf, (size_t)bs->dsk.meta_block_size };
+        data->iov = (struct iovec){ wr.it->second.buf, bs->dsk.meta_block_size };
        data->callback = simple_callback_r;
        wr.submitted = true;
        my_uring_prep_readv(
@@ -1248,7 +1247,7 @@ void journal_flusher_co::free_data_blocks()
        auto uo_it = bs->used_clean_objects.find(old_clean_loc);
        bool used = uo_it != bs->used_clean_objects.end();
 #ifdef BLOCKSTORE_DEBUG
-        printf("%s block %ju from %jx:%jx v%ju (new location is %ju)\n",
+        printf("%s block %lu from %lx:%lx v%lu (new location is %lu)\n",
            used ? "Postpone free" : "Free",
            old_clean_loc >> bs->dsk.block_order,
            cur.oid.inode, cur.oid.stripe, cur.version,
@@ -1265,7 +1264,7 @@ void journal_flusher_co::free_data_blocks()
        auto uo_it = bs->used_clean_objects.find(old_clean_loc);
        bool used = uo_it != bs->used_clean_objects.end();
 #ifdef BLOCKSTORE_DEBUG
-        printf("%s block %ju from %jx:%jx v%ju (delete)\n",
+        printf("%s block %lu from %lx:%lx v%lu (delete)\n",
            used ? "Postpone free" : "Free",
            old_clean_loc >> bs->dsk.block_order,
            cur.oid.inode, cur.oid.stripe, cur.version);
@@ -1347,6 +1346,7 @@ bool journal_flusher_co::trim_journal(int wait_base)
    else if (wait_state == wait_base+2) goto resume_2;
    else if (wait_state == wait_base+3) goto resume_3;
    else if (wait_state == wait_base+4) goto resume_4;
+    flusher->journal_trim_counter = 0;
    new_trim_pos = bs->journal.get_trim_pos();
    if (new_trim_pos != bs->journal.used_start)
    {
@@ -1378,7 +1378,7 @@ bool journal_flusher_co::trim_journal(int wait_base)
                .csum_block_size = bs->dsk.csum_block_size,
            };
            ((journal_entry_start*)flusher->journal_superblock)->crc32 = je_crc32((journal_entry*)flusher->journal_superblock);
-            data->iov = (struct iovec){ flusher->journal_superblock, (size_t)bs->dsk.journal_block_size };
+            data->iov = (struct iovec){ flusher->journal_superblock, bs->dsk.journal_block_size };
            data->callback = simple_callback_w;
            my_uring_prep_writev(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->journal.offset);
            wait_count++;
@@ -1410,7 +1410,7 @@ bool journal_flusher_co::trim_journal(int wait_base)
            }
            bs->journal.used_start = new_trim_pos;
 #ifdef BLOCKSTORE_DEBUG
-            printf("Journal trimmed to %08jx (next_free=%08jx dirty_start=%08jx)\n", bs->journal.used_start, bs->journal.next_free, bs->journal.dirty_start);
+            printf("Journal trimmed to %08lx (next_free=%08lx dirty_start=%08lx)\n", bs->journal.used_start, bs->journal.next_free, bs->journal.dirty_start);
 #endif
            if (bs->journal.flush_journal && !flusher->flush_queue.size())
            {
@@ -1419,7 +1419,6 @@ bool journal_flusher_co::trim_journal(int wait_base)
                exit(0);
            }
        }
-        flusher->journal_trim_counter = 0;
        flusher->trimming = false;
    }
    return true;
@@ -107,7 +107,7 @@ class journal_flusher_t
    blockstore_impl_t *bs;
    friend class journal_flusher_co;

-    int journal_trim_counter;
+    int journal_trim_counter, journal_trim_interval;
    bool trimming;
    void* journal_superblock;

@@ -163,10 +163,20 @@ void blockstore_impl_t::loop()
            }
            else if (op->opcode == BS_OP_SYNC)
            {
-                // sync only completed writes?
+                // wait for all small writes to be submitted
+                // wait for all big writes to complete, submit data device fsync
                // wait for the data device fsync to complete, then submit journal writes for big writes
                // then submit an fsync operation
+                if (has_writes)
+                {
+                    // Can't submit SYNC before previous writes
+                    continue;
+                }
                wr_st = continue_sync(op);
+                if (wr_st != 2)
+                {
+                    has_writes = wr_st > 0 ? 1 : 2;
+                }
            }
            else if (op->opcode == BS_OP_STABLE)
            {
@@ -195,10 +205,6 @@ void blockstore_impl_t::loop()
                    // ring is full, stop submission
                    break;
                }
-                else if (PRIV(op)->wait_for == WAIT_JOURNAL)
-                {
-                    PRIV(op)->wait_detail2 = (unstable_writes.size()+unstable_unsynced);
-                }
            }
        }
        if (op_idx != new_idx)
@@ -269,7 +275,7 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
        {
            // stop submission if there's still no free space
 #ifdef BLOCKSTORE_DEBUG
-            printf("Still waiting for %ju SQE(s)\n", PRIV(op)->wait_detail);
+            printf("Still waiting for %lu SQE(s)\n", PRIV(op)->wait_detail);
 #endif
            return;
        }
@@ -277,12 +283,11 @@ void blockstore_impl_t::check_wait(blockstore_op_t *op)
    }
    else if (PRIV(op)->wait_for == WAIT_JOURNAL)
    {
-        if (journal.used_start == PRIV(op)->wait_detail &&
-            (unstable_writes.size()+unstable_unsynced) == PRIV(op)->wait_detail2)
+        if (journal.used_start == PRIV(op)->wait_detail)
        {
            // do not submit
 #ifdef BLOCKSTORE_DEBUG
-            printf("Still waiting to flush journal offset %08jx\n", PRIV(op)->wait_detail);
+            printf("Still waiting to flush journal offset %08lx\n", PRIV(op)->wait_detail);
 #endif
            return;
        }
@@ -553,14 +558,13 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
            if (stable_count >= stable_alloc)
            {
                stable_alloc *= 2;
-                obj_ver_id* nst = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
-                if (!nst)
+                stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
+                if (!stable)
                {
                    op->retval = -ENOMEM;
                    FINISH_OP(op);
                    return;
                }
-                stable = nst;
            }
            stable[stable_count++] = {
                .oid = clean_it->first,
@@ -638,8 +642,8 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
                            if (stable_count >= stable_alloc)
                            {
                                stable_alloc += 32768;
-                                obj_ver_id *nst = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
-                                if (!nst)
+                                stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
+                                if (!stable)
                                {
                                    if (unstable)
                                        free(unstable);
@@ -647,7 +651,6 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
                                    FINISH_OP(op);
                                    return;
                                }
-                                stable = nst;
                            }
                            stable[stable_count++] = dirty_it->first;
                        }
@@ -663,8 +666,8 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
                    if (unstable_count >= unstable_alloc)
                    {
                        unstable_alloc += 32768;
-                        obj_ver_id *nst = (obj_ver_id*)realloc(unstable, sizeof(obj_ver_id) * unstable_alloc);
-                        if (!nst)
+                        unstable = (obj_ver_id*)realloc(unstable, sizeof(obj_ver_id) * unstable_alloc);
+                        if (!unstable)
                        {
                            if (stable)
                                free(stable);
@@ -672,7 +675,6 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
                            FINISH_OP(op);
                            return;
                        }
-                        unstable = nst;
                    }
                    unstable[unstable_count++] = dirty_it->first;
                }
@@ -692,8 +694,8 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
    if (stable_count+unstable_count > stable_alloc)
    {
        stable_alloc = stable_count+unstable_count;
-        obj_ver_id *nst = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
-        if (!nst)
+        stable = (obj_ver_id*)realloc(stable, sizeof(obj_ver_id) * stable_alloc);
+        if (!stable)
        {
            if (unstable)
                free(unstable);
@@ -701,7 +703,6 @@ void blockstore_impl_t::process_list(blockstore_op_t *op)
            FINISH_OP(op);
            return;
        }
-        stable = nst;
    }
    // Copy unstable entries
    for (int i = 0; i < unstable_count; i++)
@@ -55,7 +55,6 @@
 #define IS_JOURNAL(st) (((st) & 0x0F) == BS_ST_SMALL_WRITE)
 #define IS_BIG_WRITE(st) (((st) & 0x0F) == BS_ST_BIG_WRITE)
 #define IS_DELETE(st) (((st) & 0x0F) == BS_ST_DELETE)
-#define IS_INSTANT(st) (((st) & BS_ST_TYPE_MASK) == BS_ST_DELETE || ((st) & BS_ST_INSTANT))

 #define BS_SUBMIT_CHECK_SQES(n) \
    if (ringloop->sqes_left() < (n))\
@@ -202,7 +201,7 @@ struct blockstore_op_private_t
 {
    // Wait status
    int wait_for;
-    uint64_t wait_detail, wait_detail2;
+    uint64_t wait_detail;
    int pending_ops;
    int op_state;

@@ -253,7 +252,6 @@ class blockstore_impl_t
    bool inmemory_meta = false;
    // Maximum and minimum flusher count
    unsigned max_flusher_count, min_flusher_count;
-    unsigned journal_trim_interval;
    // Maximum queue depth
    unsigned max_write_iodepth = 128;
    // Enable small (journaled) write throttling, useful for the SSD+HDD case
@@ -379,7 +377,7 @@ class blockstore_impl_t
    // Stabilize
    int dequeue_stable(blockstore_op_t *op);
    int continue_stable(blockstore_op_t *op);
-    void mark_stable(obj_ver_id ov, bool forget_dirty = false);
+    void mark_stable(const obj_ver_id & ov, bool forget_dirty = false);
    void stabilize_object(object_id oid, uint64_t max_ver);
    blockstore_op_t* selective_sync(blockstore_op_t *op);
    int split_stab_op(blockstore_op_t *op, std::function<int(obj_ver_id v)> decider);
@@ -63,7 +63,7 @@ int blockstore_init_meta::loop()
        throw std::runtime_error("Failed to allocate metadata read buffer");
    // Read superblock
    GET_SQE();
-    data->iov = { metadata_buffer, (size_t)bs->dsk.meta_block_size };
+    data->iov = { metadata_buffer, bs->dsk.meta_block_size };
    data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
    my_uring_prep_readv(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
    bs->ringloop->submit();
@@ -100,7 +100,7 @@ resume_1:
        {
            printf("Initializing metadata area\n");
            GET_SQE();
-            data->iov = (struct iovec){ metadata_buffer, (size_t)bs->dsk.meta_block_size };
+            data->iov = (struct iovec){ metadata_buffer, bs->dsk.meta_block_size };
            data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
            my_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset);
            bs->ringloop->submit();
@@ -153,7 +153,7 @@ resume_1:
        else if (hdr->version > BLOCKSTORE_META_FORMAT_V2)
        {
            printf(
-                "Metadata format is too new for me (stored version is %ju, max supported %u).\n",
+                "Metadata format is too new for me (stored version is %lu, max supported %u).\n",
                hdr->version, BLOCKSTORE_META_FORMAT_V2
            );
            exit(1);
@@ -167,7 +167,7 @@ resume_1:
            printf(
                "Configuration stored in metadata superblock"
                " (meta_block_size=%u, data_block_size=%u, bitmap_granularity=%u, data_csum_type=%u, csum_block_size=%u)"
-                " differs from OSD configuration (%ju/%u/%ju, %u/%u).\n",
+                " differs from OSD configuration (%lu/%u/%lu, %u/%u).\n",
                hdr->meta_block_size, hdr->data_block_size, hdr->bitmap_granularity,
                hdr->data_csum_type, hdr->csum_block_size,
                bs->dsk.meta_block_size, bs->dsk.data_block_size, bs->dsk.bitmap_granularity,
@@ -199,8 +199,7 @@ resume_2:
                submitted++;
                next_offset += bufs[i].size;
                GET_SQE();
-                assert(bufs[i].size <= 0x7fffffff);
-                data->iov = { bufs[i].buf, (size_t)bufs[i].size };
+                data->iov = { bufs[i].buf, bufs[i].size };
                data->callback = [this, i](ring_data_t *data) { handle_event(data, i); };
                if (!zero_on_init)
                    my_uring_prep_readv(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + bufs[i].offset);
@@ -232,8 +231,7 @@ resume_2:
            {
                // write the modified buffer back
                GET_SQE();
-                assert(bufs[i].size <= 0x7fffffff);
-                data->iov = { bufs[i].buf, (size_t)bufs[i].size };
+                data->iov = { bufs[i].buf, bufs[i].size };
                data->callback = [this, i](ring_data_t *data) { handle_event(data, i); };
                my_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + bufs[i].offset);
                bufs[i].state = INIT_META_WRITING;
@@ -259,7 +257,7 @@ resume_2:
            next_offset = entries_to_zero[i]/entries_per_block;
            for (j = i; j < entries_to_zero.size() && entries_to_zero[j]/entries_per_block == next_offset; j++) {}
            GET_SQE();
-            data->iov = { metadata_buffer, (size_t)bs->dsk.meta_block_size };
+            data->iov = { metadata_buffer, bs->dsk.meta_block_size };
            data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
            my_uring_prep_readv(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + (1+next_offset)*bs->dsk.meta_block_size);
            submitted++;
@@ -275,7 +273,7 @@ resume_5:
                memset((uint8_t*)metadata_buffer + pos*bs->dsk.clean_entry_size, 0, bs->dsk.clean_entry_size);
            }
            GET_SQE();
-            data->iov = { metadata_buffer, (size_t)bs->dsk.meta_block_size };
+            data->iov = { metadata_buffer, bs->dsk.meta_block_size };
            data->callback = [this](ring_data_t *data) { handle_event(data, -1); };
            my_uring_prep_writev(sqe, bs->dsk.meta_fd, &data->iov, 1, bs->dsk.meta_offset + (1+next_offset)*bs->dsk.meta_block_size);
            submitted++;
@@ -289,7 +287,7 @@ resume_6:
        entries_to_zero.clear();
    }
    // metadata read finished
-    printf("Metadata entries loaded: %ju, free blocks: %ju / %ju\n", entries_loaded, bs->data_alloc->get_free_count(), bs->dsk.block_count);
+    printf("Metadata entries loaded: %lu, free blocks: %lu / %lu\n", entries_loaded, bs->data_alloc->get_free_count(), bs->dsk.block_count);
    if (!bs->inmemory_meta)
    {
        free(metadata_buffer);
@@ -330,7 +328,7 @@ bool blockstore_init_meta::handle_meta_block(uint8_t *buf, uint64_t entries_per_
                uint32_t *entry_csum = (uint32_t*)((uint8_t*)entry + bs->dsk.clean_entry_size - 4);
                if (*entry_csum != crc32c(0, entry, bs->dsk.clean_entry_size - 4))
                {
-                    printf("Metadata entry %ju is corrupt (checksum mismatch), skipping\n", done_cnt+i);
+                    printf("Metadata entry %lu is corrupt (checksum mismatch), skipping\n", done_cnt+i);
                    continue;
                }
            }
@@ -368,7 +366,7 @@ bool blockstore_init_meta::handle_meta_block(uint8_t *buf, uint64_t entries_per_
                        entries_to_zero.push_back(clean_it->second.location >> bs->dsk.block_order);
                    }
 #ifdef BLOCKSTORE_DEBUG
-                    printf("Free block %ju from %jx:%jx v%ju (new location is %ju)\n",
+                    printf("Free block %lu from %lx:%lx v%lu (new location is %lu)\n",
                        old_clean_loc,
                        clean_it->first.inode, clean_it->first.stripe, clean_it->second.version,
                        done_cnt+i);
@@ -382,7 +380,7 @@ bool blockstore_init_meta::handle_meta_block(uint8_t *buf, uint64_t entries_per_
                }
                entries_loaded++;
 #ifdef BLOCKSTORE_DEBUG
-                printf("Allocate block (clean entry) %ju: %jx:%jx v%ju\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
+                printf("Allocate block (clean entry) %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
 #endif
                bs->data_alloc->set(done_cnt+i, true);
                clean_db[entry->oid] = (struct clean_entry){
@@ -396,7 +394,7 @@ bool blockstore_init_meta::handle_meta_block(uint8_t *buf, uint64_t entries_per_
                updated = true;
                memset(entry, 0, bs->dsk.clean_entry_size);
 #ifdef BLOCKSTORE_DEBUG
-                printf("Old clean entry %ju: %jx:%jx v%ju\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
+                printf("Old clean entry %lu: %lx:%lx v%lu\n", done_cnt+i, entry->oid.inode, entry->oid.stripe, entry->version);
 #endif
            }
        }
@@ -468,7 +466,7 @@ int blockstore_init_journal::loop()
    if (!sqe)
        throw std::runtime_error("io_uring is full while trying to read journal");
    data = ((ring_data_t*)sqe->user_data);
-    data->iov = { submitted_buf, (size_t)bs->journal.block_size };
+    data->iov = { submitted_buf, bs->journal.block_size };
    data->callback = simple_callback;
    my_uring_prep_readv(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->journal.offset);
    bs->ringloop->submit();
@@ -509,7 +507,7 @@ resume_1:
            // FIXME: Randomize initial crc32. Track crc32 when trimming.
            printf("Resetting journal\n");
            GET_SQE();
-            data->iov = (struct iovec){ submitted_buf, (size_t)(2*bs->journal.block_size) };
+            data->iov = (struct iovec){ submitted_buf, 2*bs->journal.block_size };
            data->callback = simple_callback;
            my_uring_prep_writev(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->journal.offset);
            wait_count++;
@@ -559,7 +557,7 @@ resume_1:
            (je_start->version != JOURNAL_VERSION_V2 || je_start->size != JE_START_V2_SIZE && je_start->size != JE_START_V1_SIZE))
        {
            fprintf(
-                stderr, "The code only supports journal versions 2 and 1, but it is %ju on disk."
+                stderr, "The code only supports journal versions 2 and 1, but it is %lu on disk."
                    " Please use vitastor-disk to rewrite the journal\n",
                je_start->size == JE_START_V0_SIZE ? 0 : je_start->version
            );
@@ -608,7 +606,7 @@ resume_1:
                    submitted_buf = (uint8_t*)bs->journal.buffer + journal_pos;
                data->iov = {
                    submitted_buf,
-                    (size_t)(end - journal_pos < JOURNAL_BUFFER_SIZE ? end - journal_pos : JOURNAL_BUFFER_SIZE),
+                    end - journal_pos < JOURNAL_BUFFER_SIZE ? end - journal_pos : JOURNAL_BUFFER_SIZE,
                };
                data->callback = [this](ring_data_t *data1) { handle_event(data1); };
                my_uring_prep_readv(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->journal.offset + journal_pos);
@@ -624,7 +622,7 @@ resume_1:
                    if (init_write_buf && !bs->readonly)
                    {
                        GET_SQE();
-                        data->iov = { init_write_buf, (size_t)bs->journal.block_size };
+                        data->iov = { init_write_buf, bs->journal.block_size };
                        data->callback = simple_callback;
                        my_uring_prep_writev(sqe, bs->dsk.journal_fd, &data->iov, 1, bs->journal.offset + init_write_sector);
                        wait_count++;
@@ -693,7 +691,7 @@ resume_1:
            IS_BIG_WRITE(dirty_it->second.state) &&
            dirty_it->second.location == UINT64_MAX)
        {
-            printf("Fatal error (bug): %jx:%jx v%ju big_write journal_entry was allocated over another object\n",
+            printf("Fatal error (bug): %lx:%lx v%lu big_write journal_entry was allocated over another object\n",
                dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
            exit(1);
        }
@@ -701,7 +699,7 @@ resume_1:
    bs->flusher->mark_trim_possible();
    bs->journal.dirty_start = bs->journal.next_free;
    printf(
-        "Journal entries loaded: %ju, free journal space: %ju bytes (%08jx..%08jx is used), free blocks: %ju / %ju\n",
+        "Journal entries loaded: %lu, free journal space: %lu bytes (%08lx..%08lx is used), free blocks: %lu / %lu\n",
        entries_loaded,
        (bs->journal.next_free >= bs->journal.used_start
            ? bs->journal.len-bs->journal.block_size - (bs->journal.next_free-bs->journal.used_start)
@@ -756,7 +754,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
            {
 #ifdef BLOCKSTORE_DEBUG
                printf(
-                    "je_small_write%s oid=%jx:%jx ver=%ju offset=%u len=%u\n",
+                    "je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u\n",
                    je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                    je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
                    je->small_write.offset, je->small_write.len
@@ -778,7 +776,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                if (location != je->small_write.data_offset)
                {
                    char err[1024];
-                    snprintf(err, 1024, "BUG: calculated journal data offset (%08jx) != stored journal data offset (%08jx)", location, je->small_write.data_offset);
+                    snprintf(err, 1024, "BUG: calculated journal data offset (%08lx) != stored journal data offset (%08lx)", location, je->small_write.data_offset);
                    throw std::runtime_error(err);
                }
                small_write_data.clear();
@@ -805,7 +803,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                            covered += part_end - part_begin;
                            small_write_data.push_back((iovec){
                                .iov_base = (uint8_t*)done[i].buf + part_begin - done[i].pos,
-                                .iov_len = (size_t)(part_end - part_begin),
+                                .iov_len = part_end - part_begin,
                            });
                        }
                    }
@@ -828,7 +826,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                    if (!data_csum_valid)
                    {
                        printf(
-                            "Journal entry data is corrupt for small_write%s oid=%jx:%jx ver=%ju offset=%u len=%u - data crc32 %x != %x\n",
+                            "Journal entry data is corrupt for small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u - data crc32 %x != %x\n",
                            je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                            je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
                            je->small_write.offset, je->small_write.len,
@@ -847,7 +845,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                    if (je->size != required_size)
                    {
                        printf(
-                            "Journal entry data has invalid size for small_write%s oid=%jx:%jx ver=%ju offset=%u len=%u - should be %u bytes but is %u bytes\n",
+                            "Journal entry data has invalid size for small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u - should be %u bytes but is %u bytes\n",
                            je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                            je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
                            je->small_write.offset, je->small_write.len,
@@ -895,7 +893,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                            if (block_crc32 != *block_csums)
                            {
                                printf(
-                                    "Journal entry data is corrupt for small_write%s oid=%jx:%jx ver=%ju offset=%u len=%u - block %u crc32 %x != %x\n",
+                                    "Journal entry data is corrupt for small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u - block %u crc32 %x != %x\n",
                                    je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
                                    je->small_write.oid.inode, je->small_write.oid.stripe, je->small_write.version,
                                    je->small_write.offset, je->small_write.len,
@@ -958,7 +956,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                    bs->journal.used_sectors[proc_pos]++;
 #ifdef BLOCKSTORE_DEBUG
                    printf(
-                        "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+                        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
                        proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
                    );
 #endif
@@ -974,7 +972,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
            {
 #ifdef BLOCKSTORE_DEBUG
                printf(
-                    "je_big_write%s oid=%jx:%jx ver=%ju loc=%ju\n",
+                    "je_big_write%s oid=%lx:%lx ver=%lu loc=%lu\n",
                    je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
                    je->big_write.oid.inode, je->big_write.oid.stripe, je->big_write.version, je->big_write.location >> bs->dsk.block_order
                );
@@ -1051,7 +1049,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                    {
 #ifdef BLOCKSTORE_DEBUG
                        printf(
-                            "Allocate block (journal) %ju: %jx:%jx v%ju\n",
+                            "Allocate block (journal) %lu: %lx:%lx v%lu\n",
                            je->big_write.location >> bs->dsk.block_order,
                            ov.oid.inode, ov.oid.stripe, ov.version
                        );
@@ -1061,7 +1059,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
                    bs->journal.used_sectors[proc_pos]++;
 #ifdef BLOCKSTORE_DEBUG
                    printf(
-                        "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+                        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
                        proc_pos, ov.oid.inode, ov.oid.stripe, ov.version, bs->journal.used_sectors[proc_pos]
                    );
 #endif
@@ -1076,7 +1074,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
            else if (je->type == JE_STABLE)
            {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_stable oid=%jx:%jx ver=%ju\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
+                printf("je_stable oid=%lx:%lx ver=%lu\n", je->stable.oid.inode, je->stable.oid.stripe, je->stable.version);
 #endif
                // oid, version
                obj_ver_id ov = {
@@ -1088,7 +1086,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
            else if (je->type == JE_ROLLBACK)
            {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_rollback oid=%jx:%jx ver=%ju\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
+                printf("je_rollback oid=%lx:%lx ver=%lu\n", je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version);
 #endif
                // rollback dirty writes of <oid> up to <version>
                obj_ver_id ov = {
@@ -1100,7 +1098,7 @@ int blockstore_init_journal::handle_journal_part(void *buf, uint64_t done_pos, u
            else if (je->type == JE_DELETE)
            {
 #ifdef BLOCKSTORE_DEBUG
-                printf("je_delete oid=%jx:%jx ver=%ju\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
+                printf("je_delete oid=%lx:%lx ver=%lu\n", je->del.oid.inode, je->del.oid.stripe, je->del.version);
 #endif
                bool dirty_exists = false;
                auto dirty_it = bs->dirty_db.upper_bound((obj_ver_id){
@@ -90,8 +90,8 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
            }
            // In fact, it's even more rare than "ran out of journal space", so print a warning
            printf(
-                "Ran out of journal sector buffers: %d/%ju buffers used (%d dirty), next buffer (%jd)"
-                " is %s and flushed %ju times. Consider increasing \'journal_sector_buffer_count\'\n",
+                "Ran out of journal sector buffers: %d/%lu buffers used (%d dirty), next buffer (%ld)"
+                " is %s and flushed %lu times. Consider increasing \'journal_sector_buffer_count\'\n",
                used, bs->journal.sector_count, dirty, next_sector,
                bs->journal.sector_info[next_sector].dirty ? "dirty" : "not dirty",
                bs->journal.sector_info[next_sector].flush_count
@@ -103,7 +103,7 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
    if (data_after > 0)
    {
        next_pos = next_pos + data_after;
-        if (next_pos >= bs->journal.len)
+        if (next_pos > bs->journal.len)
        {
            if (right_dir)
                next_pos = bs->journal.block_size + data_after;
@@ -114,7 +114,7 @@ int blockstore_journal_check_t::check_available(blockstore_op_t *op, int entries
    {
        // No space in the journal. Wait until used_start changes.
        printf(
-            "Ran out of journal space (used_start=%08jx, next_free=%08jx, dirty_start=%08jx)\n",
+            "Ran out of journal space (used_start=%08lx, next_free=%08lx, dirty_start=%08lx)\n",
            bs->journal.used_start, bs->journal.next_free, bs->journal.dirty_start
        );
        PRIV(op)->wait_for = WAIT_JOURNAL;
@@ -146,7 +146,7 @@ journal_entry* prefill_single_journal_entry(journal_t & journal, uint16_t type,
        journal.in_sector_pos = 0;
        auto next_next_free = (journal.next_free+journal.block_size) < journal.len ? journal.next_free + journal.block_size : journal.block_size;
        // double check that next_free doesn't cross used_start from the left
-        assert(journal.next_free >= journal.used_start && next_next_free >= journal.next_free || next_next_free < journal.used_start);
+        assert(journal.next_free >= journal.used_start || next_next_free < journal.used_start);
        journal.next_free = next_next_free;
        memset(journal.inmemory
            ? (uint8_t*)journal.buffer + journal.sector_info[journal.cur_sector].offset
@@ -183,7 +183,7 @@ void blockstore_impl_t::prepare_journal_sector_write(int cur_sector, blockstore_
            (journal.inmemory
                ? (uint8_t*)journal.buffer + journal.sector_info[cur_sector].offset
                : (uint8_t*)journal.sector_buf + journal.block_size*cur_sector),
-            (size_t)journal.block_size
+            journal.block_size
        };
        data->callback = [this, flush_id = journal.submit_id](ring_data_t *data) { handle_journal_write(data, flush_id); };
        my_uring_prep_writev(
@@ -263,7 +263,7 @@ uint64_t journal_t::get_trim_pos()
            // next_free does not need updating during trim
 #ifdef BLOCKSTORE_DEBUG
            printf(
-                "Trimming journal (used_start=%08jx, next_free=%08jx, dirty_start=%08jx, new_start=%08jx, new_refcount=%jd)\n",
+                "Trimming journal (used_start=%08lx, next_free=%08lx, dirty_start=%08lx, new_start=%08lx, new_refcount=%ld)\n",
                used_start, next_free, dirty_start,
                journal_used_it->first, journal_used_it->second
            );
@@ -276,7 +276,7 @@ uint64_t journal_t::get_trim_pos()
        // Journal is cleared up to <journal_used_it>
 #ifdef BLOCKSTORE_DEBUG
        printf(
-            "Trimming journal (used_start=%08jx, next_free=%08jx, dirty_start=%08jx, new_start=%08jx, new_refcount=%jd)\n",
+            "Trimming journal (used_start=%08lx, next_free=%08lx, dirty_start=%08lx, new_start=%08lx, new_refcount=%ld)\n",
            used_start, next_free, dirty_start,
            journal_used_it->first, journal_used_it->second
        );
@@ -296,7 +296,7 @@ void journal_t::dump_diagnostics()
        journal_used_it = used_sectors.begin();
    }
    printf(
-        "Journal: used_start=%08jx next_free=%08jx dirty_start=%08jx trim_to=%08jx trim_to_refs=%jd\n",
+        "Journal: used_start=%08lx next_free=%08lx dirty_start=%08lx trim_to=%08lx trim_to_refs=%ld\n",
        used_start, next_free, dirty_start,
        journal_used_it == used_sectors.end() ? 0 : journal_used_it->first,
        journal_used_it == used_sectors.end() ? 0 : journal_used_it->second
@@ -13,14 +13,13 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config, bool init)
        max_flusher_count = strtoull(config["flusher_count"].c_str(), NULL, 10);
    }
    min_flusher_count = strtoull(config["min_flusher_count"].c_str(), NULL, 10);
-    journal_trim_interval = strtoull(config["journal_trim_interval"].c_str(), NULL, 10);
    max_write_iodepth = strtoull(config["max_write_iodepth"].c_str(), NULL, 10);
    throttle_small_writes = config["throttle_small_writes"] == "true" || config["throttle_small_writes"] == "1" || config["throttle_small_writes"] == "yes";
    throttle_target_iops = strtoull(config["throttle_target_iops"].c_str(), NULL, 10);
    throttle_target_mbs = strtoull(config["throttle_target_mbs"].c_str(), NULL, 10);
    throttle_target_parallelism = strtoull(config["throttle_target_parallelism"].c_str(), NULL, 10);
    throttle_threshold_us = strtoull(config["throttle_threshold_us"].c_str(), NULL, 10);
-    if (config["autosync_writes"] != "")
+    if (config.find("autosync_writes") != config.end())
    {
        autosync_writes = strtoull(config["autosync_writes"].c_str(), NULL, 10);
    }
@@ -32,10 +31,6 @@ void blockstore_impl_t::parse_config(blockstore_config_t & config, bool init)
    {
        min_flusher_count = 1;
    }
-    if (!journal_trim_interval)
-    {
-        journal_trim_interval = 512;
-    }
    if (!max_write_iodepth)
    {
        max_write_iodepth = 128;
@@ -25,7 +25,7 @@ int blockstore_impl_t::fulfill_read_push(blockstore_op_t *op, void *buf, uint64_
        return 1;
    }
    BS_SUBMIT_GET_SQE(sqe, data);
-    data->iov = (struct iovec){ buf, (size_t)len };
+    data->iov = (struct iovec){ buf, len };
    PRIV(op)->pending_ops++;
    my_uring_prep_readv(
        sqe,
@@ -505,7 +505,7 @@ int blockstore_impl_t::dequeue_read(blockstore_op_t *read_op)
        for (auto & rv: PRIV(read_op)->read_vec)
        {
            if (rv.journal_sector)
-                journal.used_sectors.at(rv.journal_sector-1)++;
+                journal.used_sectors[rv.journal_sector-1]++;
        }
    }
    read_op->retval = 0;
@@ -700,7 +700,7 @@ uint8_t* blockstore_impl_t::read_clean_meta_block(blockstore_op_t *op, uint64_t
        .buf = buf,
    });
    BS_SUBMIT_GET_SQE(sqe, data);
-    data->iov = (struct iovec){ buf, (size_t)dsk.meta_block_size };
+    data->iov = (struct iovec){ buf, dsk.meta_block_size };
    PRIV(op)->pending_ops++;
    my_uring_prep_readv(sqe, dsk.meta_fd, &data->iov, 1, dsk.meta_offset + dsk.meta_block_size + sector);
    data->callback = [this, op](ring_data_t *data) { handle_read_event(data, op); };
@@ -855,7 +855,7 @@ void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op
                            {
                                ok = false;
                                printf(
-                                    "Checksum mismatch in object %jx:%jx v%ju in journal at 0x%jx, checksum block #%u: got %08x, expected %08x\n",
+                                    "Checksum mismatch in object %lx:%lx v%lu in journal at 0x%lx, checksum block #%u: got %08x, expected %08x\n",
                                    op->oid.inode, op->oid.stripe, op->version,
                                    rv[i].disk_offset, bad_block / dsk.csum_block_size, calc_csum, stored_csum
                                );
@@ -875,7 +875,7 @@ void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op
                                {
                                    ok = false;
                                    printf(
-                                        "Checksum mismatch in object %jx:%jx v%ju in %s data at 0x%jx, checksum block #%u: got %08x, expected %08x\n",
+                                        "Checksum mismatch in object %lx:%lx v%lu in %s data at 0x%lx, checksum block #%u: got %08x, expected %08x\n",
                                        op->oid.inode, op->oid.stripe, op->version,
                                        (rv[i].copy_flags & COPY_BUF_JOURNALED_BIG ? "redirect-write" : "clean"),
                                        rv[i].disk_offset, bad_block / dsk.csum_block_size, calc_csum, stored_csum
@@ -918,7 +918,7 @@ void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op
                            {
                                // checksum error
                                printf(
-                                    "Checksum mismatch in object %jx:%jx v%ju in %s area at offset 0x%jx+0x%zx: %08x vs %08x\n",
+                                    "Checksum mismatch in object %lx:%lx v%lu in %s area at offset 0x%lx+0x%lx: %08x vs %08x\n",
                                    op->oid.inode, op->oid.stripe, op->version,
                                    (vec.copy_flags & COPY_BUF_JOURNAL) ? "journal" : "data", vec.disk_offset, p,
                                    crc32c(0, (uint8_t*)op->buf + vec.offset - op->offset + p, dsk.csum_block_size), *csum
@@ -966,7 +966,7 @@ void blockstore_impl_t::handle_read_event(ring_data_t *data, blockstore_op_t *op
            {
                if (rv.journal_sector)
                {
-                    auto used = --journal.used_sectors.at(rv.journal_sector-1);
+                    auto used = --journal.used_sectors[rv.journal_sector-1];
                    if (used == 0)
                    {
                        journal.used_sectors.erase(rv.journal_sector-1);
@@ -179,7 +179,7 @@ void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start,
    {
        object_id oid = dirty_it->first.oid;
 #ifdef BLOCKSTORE_DEBUG
-        printf("Unblock writes-after-delete %jx:%jx v%ju\n", oid.inode, oid.stripe, dirty_it->first.version);
+        printf("Unblock writes-after-delete %lx:%lx v%lu\n", oid.inode, oid.stripe, dirty_it->first.version);
 #endif
        dirty_it = dirty_end;
        // Unblock operations blocked by delete flushing
@@ -210,26 +210,21 @@ void blockstore_impl_t::erase_dirty(blockstore_dirty_db_t::iterator dirty_start,
            dirty_it->second.location != UINT64_MAX)
        {
 #ifdef BLOCKSTORE_DEBUG
-            printf("Free block %ju from %jx:%jx v%ju\n", dirty_it->second.location >> dsk.block_order,
+            printf("Free block %lu from %lx:%lx v%lu\n", dirty_it->second.location >> dsk.block_order,
                dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version);
 #endif
            data_alloc->set(dirty_it->second.location >> dsk.block_order, false);
        }
-        auto used = --journal.used_sectors.at(dirty_it->second.journal_sector);
+        auto used = --journal.used_sectors[dirty_it->second.journal_sector];
 #ifdef BLOCKSTORE_DEBUG
        printf(
-            "remove usage of journal offset %08jx by %jx:%jx v%ju (%ju refs)\n", dirty_it->second.journal_sector,
+            "remove usage of journal offset %08lx by %lx:%lx v%lu (%lu refs)\n", dirty_it->second.journal_sector,
            dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version, used
        );
 #endif
        if (used == 0)
        {
            journal.used_sectors.erase(dirty_it->second.journal_sector);
-            if (dirty_it->second.journal_sector == journal.sector_info[journal.cur_sector].offset)
-            {
-                // Mark current sector as "full" to select the new one
-                journal.in_sector_pos = dsk.journal_block_size;
-            }
            flusher->mark_trim_possible();
        }
        free_dirty_dyn_data(dirty_it->second);
@@ -298,7 +298,7 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
            if (clean_it == clean_db.end() || clean_it->second.version < ov.version)
            {
                // No such object version
-                printf("Error: %jx:%jx v%ju not found while stabilizing\n", ov.oid.inode, ov.oid.stripe, ov.version);
+                printf("Error: %lx:%lx v%lu not found while stabilizing\n", ov.oid.inode, ov.oid.stripe, ov.version);
                return -ENOENT;
            }
            else
@@ -307,49 +307,35 @@ int blockstore_impl_t::dequeue_stable(blockstore_op_t *op)
                return STAB_SPLIT_DONE;
            }
        }
+        else if (IS_IN_FLIGHT(dirty_it->second.state))
+        {
+            // Object write is still in progress. Wait until the write request completes
+            return STAB_SPLIT_WAIT;
+        }
+        else if (!IS_SYNCED(dirty_it->second.state))
+        {
+            // Object not synced yet - sync it
+            // In previous versions we returned EBUSY here and required
+            // the caller (OSD) to issue a global sync first. But a global sync
+            // waits for all writes in the queue including inflight writes. And
+            // inflight writes may themselves be blocked by unstable writes being
+            // still present in the journal and not flushed away from it.
+            // So we must sync specific objects here.
+            //
+            // Even more, we have to process "stabilize" request in parts. That is,
+            // we must stabilize all objects which are already synced. Otherwise
+            // they may block objects which are NOT synced yet.
+            return STAB_SPLIT_SYNC;
+        }
        else if (IS_STABLE(dirty_it->second.state))
        {
            // Already stable
            return STAB_SPLIT_DONE;
        }
-        while (true)
+        else
        {
-            if (IS_IN_FLIGHT(dirty_it->second.state))
-            {
-                // Object write is still in progress. Wait until the write request completes
-                return STAB_SPLIT_WAIT;
-            }
-            else if (!IS_SYNCED(dirty_it->second.state))
-            {
-                // Object not synced yet - sync it
-                // In previous versions we returned EBUSY here and required
-                // the caller (OSD) to issue a global sync first. But a global sync
-                // waits for all writes in the queue including inflight writes. And
-                // inflight writes may themselves be blocked by unstable writes being
-                // still present in the journal and not flushed away from it.
-                // So we must sync specific objects here.
-                //
-                // Even more, we have to process "stabilize" request in parts. That is,
-                // we must stabilize all objects which are already synced. Otherwise
-                // they may block objects which are NOT synced yet.
-                return STAB_SPLIT_SYNC;
-            }
-            else if (IS_STABLE(dirty_it->second.state))
-            {
-                break;
-            }
-            // Check previous versions too
-            if (dirty_it == dirty_db.begin())
-            {
-                break;
-            }
-            dirty_it--;
-            if (dirty_it->first.oid != ov.oid)
-            {
-                break;
-            }
+            return STAB_SPLIT_TODO;
        }
-        return STAB_SPLIT_TODO;
    });
    if (r != 1)
    {
@@ -416,7 +402,7 @@ resume_4:
    {
        // Mark all dirty_db entries up to op->version as stable
 #ifdef BLOCKSTORE_DEBUG
-        printf("Stabilize %jx:%jx v%ju\n", v->oid.inode, v->oid.stripe, v->version);
+        printf("Stabilize %lx:%lx v%lu\n", v->oid.inode, v->oid.stripe, v->version);
 #endif
        mark_stable(*v);
    }
@@ -426,40 +412,11 @@ resume_4:
    return 2;
 }

-void blockstore_impl_t::mark_stable(obj_ver_id v, bool forget_dirty)
+void blockstore_impl_t::mark_stable(const obj_ver_id & v, bool forget_dirty)
 {
    auto dirty_it = dirty_db.find(v);
    if (dirty_it != dirty_db.end())
    {
-        if (IS_INSTANT(dirty_it->second.state))
-        {
-            // 'Instant' (non-EC) operations may complete and try to become stable out of order. Prevent it.
-            auto back_it = dirty_it;
-            while (back_it != dirty_db.begin())
-            {
-                back_it--;
-                if (back_it->first.oid != v.oid)
-                {
-                    break;
-                }
-                if (!IS_STABLE(back_it->second.state))
-                {
-                    // There are preceding unstable versions, can't flush <v>
-                    return;
-                }
-            }
-            while (true)
-            {
-                dirty_it++;
-                if (dirty_it == dirty_db.end() || dirty_it->first.oid != v.oid ||
-                    !IS_SYNCED(dirty_it->second.state))
-                {
-                    dirty_it--;
-                    break;
-                }
-                v.version = dirty_it->first.version;
-            }
-        }
        while (1)
        {
            bool was_stable = IS_STABLE(dirty_it->second.state);
@@ -507,7 +464,7 @@ void blockstore_impl_t::mark_stable(obj_ver_id v, bool forget_dirty)
            {
                // mark_stable should never be called for in-flight or submitted writes
                printf(
-                    "BUG: Attempt to mark_stable object %jx:%jx v%ju state of which is %x\n",
+                    "BUG: Attempt to mark_stable object %lx:%lx v%lu state of which is %x\n",
                    dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
                    dirty_it->second.state
                );
@@ -85,14 +85,16 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op)
                left--;
                auto & dirty_entry = dirty_db.at(sbw);
                uint64_t dyn_size = dsk.dirty_dyn_size(dirty_entry.offset, dirty_entry.len);
-                if (!space_check.check_available(op, 1, sizeof(journal_entry_big_write) + dyn_size, 0))
+                if (!space_check.check_available(op, 1, sizeof(journal_entry_big_write) + dyn_size,
+                    (unstable_writes.size()+unstable_unsynced)*journal.block_size))
                {
                    return 0;
                }
            }
        }
        else if (!space_check.check_available(op, PRIV(op)->sync_big_writes.size(),
-            sizeof(journal_entry_big_write) + dsk.clean_entry_bitmap_size, 0))
+            sizeof(journal_entry_big_write) + dsk.clean_entry_bitmap_size,
+            (unstable_writes.size()+unstable_unsynced)*journal.block_size))
        {
            return 0;
        }
@@ -115,14 +117,11 @@ int blockstore_impl_t::continue_sync(blockstore_op_t *op)
                journal, (dirty_entry.state & BS_ST_INSTANT) ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
                sizeof(journal_entry_big_write) + dyn_size
            );
-            auto jsec = dirty_entry.journal_sector = journal.sector_info[journal.cur_sector].offset;
-            assert(journal.next_free >= journal.used_start
-                ? (jsec >= journal.used_start && jsec < journal.next_free)
-                : (jsec >= journal.used_start || jsec < journal.next_free));
+            dirty_entry.journal_sector = journal.sector_info[journal.cur_sector].offset;
            journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
            printf(
-                "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+                "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
                dirty_entry.journal_sector, it->oid.inode, it->oid.stripe, it->version,
                journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
            );
@@ -176,7 +175,7 @@ void blockstore_impl_t::ack_sync(blockstore_op_t *op)
    for (auto it = PRIV(op)->sync_big_writes.begin(); it != PRIV(op)->sync_big_writes.end(); it++)
    {
 #ifdef BLOCKSTORE_DEBUG
-        printf("Ack sync big %jx:%jx v%ju\n", it->oid.inode, it->oid.stripe, it->version);
+        printf("Ack sync big %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
 #endif
        auto & unstab = unstable_writes[it->oid];
        unstab = unstab < it->version ? it->version : unstab;
@@ -204,7 +203,7 @@ void blockstore_impl_t::ack_sync(blockstore_op_t *op)
    for (auto it = PRIV(op)->sync_small_writes.begin(); it != PRIV(op)->sync_small_writes.end(); it++)
    {
 #ifdef BLOCKSTORE_DEBUG
-        printf("Ack sync small %jx:%jx v%ju\n", it->oid.inode, it->oid.stripe, it->version);
+        printf("Ack sync small %lx:%lx v%lu\n", it->oid.inode, it->oid.stripe, it->version);
 #endif
        auto & unstab = unstable_writes[it->oid];
        unstab = unstab < it->version ? it->version : unstab;
@@ -85,7 +85,7 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
            // It's allowed to write versions with low numbers over deletes
            // However, we have to flush those deletes first as we use version number for ordering
 #ifdef BLOCKSTORE_DEBUG
-            printf("Write %jx:%jx v%ju over delete (real v%ju) offset=%u len=%u\n", op->oid.inode, op->oid.stripe, version, op->version, op->offset, op->len);
+            printf("Write %lx:%lx v%lu over delete (real v%lu) offset=%u len=%u\n", op->oid.inode, op->oid.stripe, version, op->version, op->offset, op->len);
 #endif
            wait_del = true;
            PRIV(op)->real_version = op->version;
@@ -95,13 +95,11 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
                // Issue an additional sync so the delete reaches the journal
                blockstore_op_t *sync_op = new blockstore_op_t;
                sync_op->opcode = BS_OP_SYNC;
-                sync_op->oid = op->oid;
-                sync_op->version = op->version;
-                sync_op->callback = [this](blockstore_op_t *sync_op)
+                sync_op->callback = [this, op](blockstore_op_t *sync_op)
                {
                    flusher->unshift_flush((obj_ver_id){
-                        .oid = sync_op->oid,
-                        .version = sync_op->version-1,
+                        .oid = op->oid,
+                        .version = op->version-1,
                    }, true);
                    delete sync_op;
                };
@@ -119,7 +117,7 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
        {
            // Invalid version requested
 #ifdef BLOCKSTORE_DEBUG
-            printf("Write %jx:%jx v%ju requested, but we already have v%ju\n", op->oid.inode, op->oid.stripe, op->version, version);
+            printf("Write %lx:%lx v%lu requested, but we already have v%lu\n", op->oid.inode, op->oid.stripe, op->version, version);
 #endif
            op->retval = -EEXIST;
            if (!is_del && alloc_dyn_data)
@@ -131,7 +129,7 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
    }
    bool imm = (op->len < dsk.data_block_size ? (immediate_commit != IMMEDIATE_NONE) : (immediate_commit == IMMEDIATE_ALL));
    if (wait_big && !is_del && !deleted && op->len < dsk.data_block_size && !imm ||
-        !imm && autosync_writes && unsynced_queued_ops >= autosync_writes)
+        !imm && unsynced_queued_ops >= autosync_writes)
    {
        // Issue an additional sync so that the previous big write can reach the journal
        blockstore_op_t *sync_op = new blockstore_op_t;
@@ -146,9 +144,9 @@ bool blockstore_impl_t::enqueue_write(blockstore_op_t *op)
        unsynced_queued_ops++;
 #ifdef BLOCKSTORE_DEBUG
    if (is_del)
-        printf("Delete %jx:%jx v%ju\n", op->oid.inode, op->oid.stripe, op->version);
+        printf("Delete %lx:%lx v%lu\n", op->oid.inode, op->oid.stripe, op->version);
    else if (!wait_del)
-        printf("Write %jx:%jx v%ju offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
+        printf("Write %lx:%lx v%lu offset=%u len=%u\n", op->oid.inode, op->oid.stripe, op->version, op->offset, op->len);
 #endif
    // No strict need to add it into dirty_db here except maybe for listings to return
    // correct data when there are inflight operations in the queue
@@ -288,7 +286,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        }
        // Restore original low version number for unblocked operations
 #ifdef BLOCKSTORE_DEBUG
-        printf("Restoring %jx:%jx version: v%ju -> v%ju\n", op->oid.inode, op->oid.stripe, op->version, PRIV(op)->real_version);
+        printf("Restoring %lx:%lx version: v%lu -> v%lu\n", op->oid.inode, op->oid.stripe, op->version, PRIV(op)->real_version);
 #endif
        auto prev_it = dirty_it;
        if (prev_it != dirty_db.begin())
@@ -298,7 +296,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            {
                // Original version is still invalid
                // All subsequent writes to the same object must be canceled too
-                printf("Tried to write %jx:%jx v%ju after delete (old version v%ju), but already have v%ju\n",
+                printf("Tried to write %lx:%lx v%lu after delete (old version v%lu), but already have v%lu\n",
                    op->oid.inode, op->oid.stripe, PRIV(op)->real_version, op->version, prev_it->first.version);
                cancel_all_writes(op, dirty_it, -EEXIST);
                return 2;
@@ -322,7 +320,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        blockstore_journal_check_t space_check(this);
        if (!space_check.check_available(op, unsynced_big_write_count + 1,
            sizeof(journal_entry_big_write) + dsk.clean_dyn_size,
-            (unstable_writes.size()+unstable_unsynced+((dirty_it->second.state & BS_ST_INSTANT) ? 0 : 1))*journal.block_size))
+            (unstable_writes.size()+unstable_unsynced)*journal.block_size))
        {
            return 0;
        }
@@ -350,8 +348,8 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            if (entry->oid.inode || entry->oid.stripe || entry->version)
            {
                printf(
-                    "Fatal error (metadata corruption or bug): tried to write object %jx:%jx v%ju"
-                    " over a non-zero metadata entry %ju with %jx:%jx v%ju\n", op->oid.inode,
+                    "Fatal error (metadata corruption or bug): tried to write object %lx:%lx v%lu"
+                    " over a non-zero metadata entry %lu with %lx:%lx v%lu\n", op->oid.inode,
                    op->oid.stripe, op->version, loc, entry->oid.inode, entry->oid.stripe, entry->version
                );
                exit(1);
@@ -363,7 +361,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        dirty_it->second.state = (dirty_it->second.state & ~BS_ST_WORKFLOW_MASK) | BS_ST_SUBMITTED;
 #ifdef BLOCKSTORE_DEBUG
        printf(
-            "Allocate block %ju for %jx:%jx v%ju\n",
+            "Allocate block %lu for %lx:%lx v%lu\n",
            loc, op->oid.inode, op->oid.stripe, op->version
        );
 #endif
@@ -374,13 +372,13 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        int vcnt = 0;
        if (stripe_offset)
        {
-            PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, (size_t)stripe_offset };
+            PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, stripe_offset };
        }
        PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ op->buf, op->len };
        if (stripe_end)
        {
            stripe_end = dsk.bitmap_granularity - stripe_end;
-            PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, (size_t)stripe_end };
+            PRIV(op)->iov_zerofill[vcnt++] = (struct iovec){ zero_object, stripe_end };
        }
        data->iov.iov_len = op->len + stripe_offset + stripe_end; // to check it in the callback
        data->callback = [this, op](ring_data_t *data) { handle_write_event(data, op); };
@@ -414,7 +412,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
                sizeof(journal_entry_big_write) + dsk.clean_dyn_size, 0)
            || !space_check.check_available(op, 1,
                sizeof(journal_entry_small_write) + dyn_size,
-                op->len + (unstable_writes.size()+unstable_unsynced+((dirty_it->second.state & BS_ST_INSTANT) ? 0 : 1))*journal.block_size))
+                op->len + (unstable_writes.size()+unstable_unsynced)*journal.block_size))
        {
            return 0;
        }
@@ -438,23 +436,11 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            journal, op->opcode == BS_OP_WRITE_STABLE ? JE_SMALL_WRITE_INSTANT : JE_SMALL_WRITE,
            sizeof(journal_entry_small_write) + dyn_size
        );
-        auto jsec = dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
-        if (!(journal.next_free >= journal.used_start
-            ? (jsec >= journal.used_start && jsec < journal.next_free)
-            : (jsec >= journal.used_start || jsec < journal.next_free)))
-        {
-            printf(
-                "BUG: journal offset %08jx is used by %jx:%jx v%ju (%ju refs) BUT used_start=%jx next_free=%jx\n",
-                dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
-                journal.used_sectors[journal.sector_info[journal.cur_sector].offset],
-                journal.used_start, journal.next_free
-            );
-            abort();
-        }
+        dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
        journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
        printf(
-            "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+            "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
            dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
            journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
        );
@@ -468,8 +454,8 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
                journal_used_it->first < next_next_free + op->len)
            {
                printf(
-                    "BUG: Attempt to overwrite used offset (%jx, %ju refs) of the journal with the object %jx:%jx v%ju: data at %jx, len %x!"
-                    " Journal used_start=%08jx (%ju refs), next_free=%08jx, dirty_start=%08jx\n",
+                    "BUG: Attempt to overwrite used offset (%lx, %lu refs) of the journal with the object %lx:%lx v%lu: data at %lx, len %x!"
+                    " Journal used_start=%08lx (%lu refs), next_free=%08lx, dirty_start=%08lx\n",
                    journal_used_it->first, journal_used_it->second, op->oid.inode, op->oid.stripe, op->version, next_next_free, op->len,
                    journal.used_start, journal.used_sectors[journal.used_start], journal.next_free, journal.dirty_start
                );
@@ -477,7 +463,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
            }
        }
        // double check that next_free doesn't cross used_start from the left
-        assert(journal.next_free >= journal.used_start && next_next_free >= journal.next_free || next_next_free < journal.used_start);
+        assert(journal.next_free >= journal.used_start || next_next_free < journal.used_start);
        journal.next_free = next_next_free;
        je->oid = op->oid;
        je->version = op->version;
@@ -519,7 +505,7 @@ int blockstore_impl_t::dequeue_write(blockstore_op_t *op)
        if (next_next_free >= journal.len)
            next_next_free = dsk.journal_block_size;
        // double check that next_free doesn't cross used_start from the left
-        assert(journal.next_free >= journal.used_start && next_next_free >= journal.next_free || next_next_free < journal.used_start);
+        assert(journal.next_free >= journal.used_start || next_next_free < journal.used_start);
        journal.next_free = next_next_free;
        if (!(dirty_it->second.state & BS_ST_INSTANT))
        {
@@ -563,7 +549,7 @@ resume_2:
        uint64_t dyn_size = dsk.dirty_dyn_size(op->offset, op->len);
        blockstore_journal_check_t space_check(this);
        if (!space_check.check_available(op, 1, sizeof(journal_entry_big_write) + dyn_size,
-            (unstable_writes.size()+unstable_unsynced+((dirty_it->second.state & BS_ST_INSTANT) ? 0 : 1))*journal.block_size))
+            (unstable_writes.size()+unstable_unsynced)*journal.block_size))
        {
            return 0;
        }
@@ -572,23 +558,11 @@ resume_2:
            journal, op->opcode == BS_OP_WRITE_STABLE ? JE_BIG_WRITE_INSTANT : JE_BIG_WRITE,
            sizeof(journal_entry_big_write) + dyn_size
        );
-        auto jsec = dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
-        if (!(journal.next_free >= journal.used_start
-            ? (jsec >= journal.used_start && jsec < journal.next_free)
-            : (jsec >= journal.used_start || jsec < journal.next_free)))
-        {
-            printf(
-                "BUG: journal offset %08jx is used by %jx:%jx v%ju (%ju refs) BUT used_start=%jx next_free=%jx\n",
-                dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
-                journal.used_sectors[journal.sector_info[journal.cur_sector].offset],
-                journal.used_start, journal.next_free
-            );
-            abort();
-        }
+        dirty_it->second.journal_sector = journal.sector_info[journal.cur_sector].offset;
        journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
        printf(
-            "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+            "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
            journal.sector_info[journal.cur_sector].offset, op->oid.inode, op->oid.stripe, op->version,
            journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
        );
@@ -615,11 +589,11 @@ resume_4:
        });
        assert(dirty_it != dirty_db.end());
 #ifdef BLOCKSTORE_DEBUG
-        printf("Ack write %jx:%jx v%ju = state 0x%x\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
+        printf("Ack write %lx:%lx v%lu = state 0x%x\n", op->oid.inode, op->oid.stripe, op->version, dirty_it->second.state);
 #endif
        bool is_big = (dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_BIG_WRITE;
        bool imm = is_big ? (immediate_commit == IMMEDIATE_ALL) : (immediate_commit != IMMEDIATE_NONE);
-        bool is_instant = IS_INSTANT(dirty_it->second.state);
+        bool is_instant = ((dirty_it->second.state & BS_ST_TYPE_MASK) == BS_ST_DELETE || (dirty_it->second.state & BS_ST_INSTANT));
        if (imm)
        {
            auto & unstab = unstable_writes[op->oid];
@@ -808,7 +782,7 @@ int blockstore_impl_t::dequeue_del(blockstore_op_t *op)
    journal.used_sectors[journal.sector_info[journal.cur_sector].offset]++;
 #ifdef BLOCKSTORE_DEBUG
    printf(
-        "journal offset %08jx is used by %jx:%jx v%ju (%ju refs)\n",
+        "journal offset %08lx is used by %lx:%lx v%lu (%lu refs)\n",
        dirty_it->second.journal_sector, dirty_it->first.oid.inode, dirty_it->first.oid.stripe, dirty_it->first.version,
        journal.used_sectors[journal.sector_info[journal.cur_sector].offset]
    );
@@ -46,21 +46,18 @@ static const char* help_text =
    "vitastor-cli snap-create [-p|--pool <id|name>] <image>@<snapshot>\n"
    "  Create a snapshot of image <name>. May be used live if only a single writer is active.\n"
    "\n"
-    "vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force] [--down-ok]\n"
+    "vitastor-cli modify <name> [--rename <new-name>] [--resize <size>] [--readonly | --readwrite] [-f|--force]\n"
    "  Rename, resize image or change its readonly status. Images with children can't be made read-write.\n"
    "  If the new size is smaller than the old size, extra data will be purged.\n"
    "  You should resize file system in the image, if present, before shrinking it.\n"
    "  -f|--force  Proceed with shrinking or setting readwrite flag even if the image has children.\n"
-    "  --down-ok   Proceed with shrinking even if some data will be left on unavailable OSDs.\n"
    "\n"
-    "vitastor-cli rm <from> [<to>] [--writers-stopped] [--down-ok]\n"
+    "vitastor-cli rm <from> [<to>] [--writers-stopped]\n"
    "  Remove <from> or all layers between <from> and <to> (<to> must be a child of <from>),\n"
    "  rebasing all their children accordingly. --writers-stopped allows merging to be a bit\n"
    "  more effective in case of a single 'slim' read-write child and 'fat' removed parent:\n"
    "  the child is merged into parent and parent is renamed to child in that case.\n"
    "  In other cases parent layers are always merged into children.\n"
-    "  Other options:\n"
-    "  --down-ok  Continue deletion/merging even if some data will be left on unavailable OSDs.\n"
    "\n"
    "vitastor-cli flatten <layer>\n"
    "  Flatten a layer, i.e. merge data and detach it from parents.\n"
@@ -125,7 +122,7 @@ static const char* help_text =
    "  --parallel_osds M   Work with M osds in parallel when possible (default 4)\n"
    "  --progress 1|0      Report progress (default 1)\n"
    "  --cas 1|0           Use CAS writes for flatten, merge, rm (default is decide automatically)\n"
-    "  --color 1|0         Enable/disable colored output and CR symbols (default 1 if stdout is a terminal)\n"
+    "  --no-color          Disable colored output\n"
    "  --json              JSON output\n"
 ;

@@ -174,7 +171,6 @@ static json11::Json::object parse_args(int narg, const char *args[])
                !strcmp(opt, "readonly") || !strcmp(opt, "readwrite") ||
                !strcmp(opt, "force") || !strcmp(opt, "reverse") ||
                !strcmp(opt, "allow-data-loss") || !strcmp(opt, "allow_data_loss") ||
-                !strcmp(opt, "down-ok") || !strcmp(opt, "down_ok") ||
                !strcmp(opt, "dry-run") || !strcmp(opt, "dry_run") ||
                !strcmp(opt, "help") || !strcmp(opt, "all") ||
                (!strcmp(opt, "writers-stopped") || !strcmp(opt, "writers_stopped")) && strcmp("1", args[i+1]) != 0
@@ -77,7 +77,7 @@ struct alloc_osd_t
                    std::string key = base64_decode(kv["key"].string_value());
                    osd_num_t cur_osd;
                    char null_byte = 0;
-                    int scanned = sscanf(key.c_str() + parent->cli->st_cli.etcd_prefix.length(), "/osd/stats/%ju%c", &cur_osd, &null_byte);
+                    int scanned = sscanf(key.c_str() + parent->cli->st_cli.etcd_prefix.length(), "/osd/stats/%lu%c", &cur_osd, &null_byte);
                    if (scanned != 1 || !cur_osd)
                    {
                        fprintf(stderr, "Invalid key in etcd: %s\n", key.c_str());
@@ -1,7 +1,6 @@
 // Copyright (c) Vitaliy Filippov, 2019+
 // License: VNPL-1.1 (see README.md for details)

-#include <unistd.h>
 #include "str_util.h"
 #include "cluster_client.h"
 #include "cli.h"
@@ -12,7 +11,7 @@ void cli_tool_t::change_parent(inode_t cur, inode_t new_parent, cli_result_t *re
    if (cur_cfg_it == cli->st_cli.inode_config.end())
    {
        char buf[128];
-        snprintf(buf, 128, "Inode 0x%jx disappeared", cur);
+        snprintf(buf, 128, "Inode 0x%lx disappeared", cur);
        *result = (cli_result_t){ .err = EIO, .text = buf };
        return;
    }
@@ -114,12 +113,7 @@ void cli_tool_t::parse_config(json11::Json::object & cfg)
        else
            kv_it++;
    }
-    if (cfg.find("no_color") != cfg.end())
-        color = !cfg["no_color"].bool_value();
-    else if (cfg.find("color") != cfg.end())
-        color = cfg["color"].bool_value();
-    else
-        color = isatty(1);
+    color = !cfg["no_color"].bool_value();
    json_output = cfg["json"].bool_value();
    iodepth = cfg["iodepth"].uint64_value();
    if (!iodepth)
@@ -160,14 +160,14 @@ struct cli_describe_t
                if (op->reply.hdr.retval < 0)
                {
                    fprintf(
-                        stderr, "Failed to describe objects on OSD %ju (retval=%jd)\n",
+                        stderr, "Failed to describe objects on OSD %lu (retval=%ld)\n",
                        osd_num, op->reply.hdr.retval
                    );
                }
                else if (op->reply.describe.result_bytes != op->reply.hdr.retval * sizeof(osd_reply_describe_item_t))
                {
                    fprintf(
-                        stderr, "Invalid response size from OSD %ju (expected %ju bytes, got %ju bytes)\n",
+                        stderr, "Invalid response size from OSD %lu (expected %lu bytes, got %lu bytes)\n",
                        osd_num, op->reply.hdr.retval * sizeof(osd_reply_describe_item_t), op->reply.describe.result_bytes
                    );
                }
@@ -178,11 +178,11 @@ struct cli_describe_t
                    {
                        if (!parent->json_output || parent->is_command_line)
                        {
-#define FMT "{\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"part\":%u,\"osd_num\":%ju%s%s%s}"
+#define FMT "{\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"part\":%u,\"osd_num\":%lu%s%s%s}"
                            printf(
                                (parent->json_output
                                    ? (count > 0 ? ",\n  " FMT : "  " FMT)
-                                    : "%jx:%jx part %u on OSD %ju%s%s%s\n"),
+                                    : "%lx:%lx part %u on OSD %lu%s%s%s\n"),
 #undef FMT
                                items[i].inode, items[i].stripe,
                                items[i].role, items[i].osd_num,
@@ -82,7 +82,7 @@ resume_1:
            // osd ID
            osd_num_t osd_num;
            char null_byte = 0;
-            int scanned = sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(), "/osd/stats/%ju%c", &osd_num, &null_byte);
+            int scanned = sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(), "/osd/stats/%lu%c", &osd_num, &null_byte);
            if (scanned != 1 || !osd_num || osd_num >= POOL_ID_MAX)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
@@ -136,7 +136,7 @@ struct cli_fix_t
            auto pool_cfg_it = parent->cli->st_cli.pool_config.find(INODE_POOL(obj.inode));
            if (pool_cfg_it == parent->cli->st_cli.pool_config.end())
            {
-                fprintf(stderr, "Object %jx:%jx is from unknown pool\n", obj.inode, obj.stripe);
+                fprintf(stderr, "Object %lx:%lx is from unknown pool\n", obj.inode, obj.stripe);
                continue;
            }
            auto & pool_cfg = pool_cfg_it->second;
@@ -146,7 +146,7 @@ struct cli_fix_t
                !pg_it->second.cur_primary || !(pg_it->second.cur_state & PG_ACTIVE))
            {
                fprintf(
-                    stderr, "Object %jx:%jx is from PG %u/%u which is not currently active\n",
+                    stderr, "Object %lx:%lx is from PG %u/%u which is not currently active\n",
                    obj.inode, obj.stripe, pool_cfg_it->first, pg_num
                );
                continue;
@@ -171,7 +171,7 @@ struct cli_fix_t
            {
                if (op->reply.hdr.retval < 0 || op->reply.describe.result_bytes != op->reply.hdr.retval * sizeof(osd_reply_describe_item_t))
                {
-                    fprintf(stderr, "Failed to describe objects on OSD %ju (retval=%jd)\n", primary_osd, op->reply.hdr.retval);
+                    fprintf(stderr, "Failed to describe objects on OSD %lu (retval=%ld)\n", primary_osd, op->reply.hdr.retval);
                    parent->waiting--;
                    loop();
                }
@@ -209,7 +209,7 @@ struct cli_fix_t
                                if (rm_op->reply.hdr.retval < 0)
                                {
                                    fprintf(
-                                        stderr, "Failed to remove object %jx:%jx from OSD %ju (retval=%jd)\n",
+                                        stderr, "Failed to remove object %lx:%lx from OSD %lu (retval=%ld)\n",
                                        rm_op->req.sec_del.oid.inode, rm_op->req.sec_del.oid.stripe,
                                        rm_osd_num, rm_op->reply.hdr.retval
                                    );
@@ -226,7 +226,7 @@ struct cli_fix_t
                                else
                                {
                                    printf(
-                                        "Removed %jx:%jx (part %ju) from OSD %ju\n",
+                                        "Removed %lx:%lx (part %lu) from OSD %lu\n",
                                        rm_op->req.sec_del.oid.inode, rm_op->req.sec_del.oid.stripe & ~STRIPE_MASK,
                                        rm_op->req.sec_del.oid.stripe & STRIPE_MASK, rm_osd_num
                                    );
@@ -254,7 +254,7 @@ struct cli_fix_t
                                        if (scrub_op->reply.hdr.retval < 0 && scrub_op->reply.hdr.retval != -ENOENT)
                                        {
                                            fprintf(
-                                                stderr, "Failed to scrub %jx:%jx on OSD %ju (retval=%jd)\n",
+                                                stderr, "Failed to scrub %lx:%lx on OSD %lu (retval=%ld)\n",
                                                obj.inode, obj.stripe, primary_osd, scrub_op->reply.hdr.retval
                                            );
                                        }
@@ -150,7 +150,7 @@ resume_1:
            inode_t only_inode_num;
            char null_byte = 0;
            int scanned = sscanf(kv.key.substr(parent->cli->st_cli.etcd_prefix.length()).c_str(),
-                "/inode/stats/%u/%ju%c", &pool_id, &only_inode_num, &null_byte);
+                "/inode/stats/%u/%lu%c", &pool_id, &only_inode_num, &null_byte);
            if (scanned != 2 || !pool_id || pool_id >= POOL_ID_MAX || INODE_POOL(only_inode_num) != 0)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
@@ -456,7 +456,7 @@ std::string format_lat(uint64_t lat)
    char buf[256];
    int l = 0;
    if (lat < 100)
-        l = snprintf(buf, sizeof(buf), "%ju us", lat);
+        l = snprintf(buf, sizeof(buf), "%lu us", lat);
    else if (lat < 500000)
        l = snprintf(buf, sizeof(buf), "%.2f ms", (double)lat/1000);
    else
@@ -202,7 +202,7 @@ struct snap_merger_t
        if (parent->progress)
        {
            printf(
-                "Merging %zd layer(s) into target %s%s (inode %ju in pool %u)\n",
+                "Merging %ld layer(s) into target %s%s (inode %lu in pool %u)\n",
                sources.size(), target_cfg->name.c_str(),
                use_cas ? " online (with CAS)" : "", INODE_NO_POOL(target), INODE_POOL(target)
            );
@@ -275,9 +275,7 @@ struct snap_merger_t
                processed++;
                if (parent->progress && !(processed % 128))
                {
-                    fprintf(stderr, parent->color
-                        ? "\rFiltering target blocks: %ju/%ju"
-                        : "Filtering target blocks: %ju/%ju\n", processed, to_process);
+                    printf("\rFiltering target blocks: %lu/%lu", processed, to_process);
                }
            }
            if (in_flight > 0 || oit != merge_offsets.end())
@@ -287,9 +285,7 @@ struct snap_merger_t
            }
            if (parent->progress)
            {
-                fprintf(stderr, parent->color
-                    ? "\r%ju full blocks of target filtered out\n"
-                    : "%ju full blocks of target filtered out\n", to_process-merge_offsets.size());
+                printf("\r%lu full blocks of target filtered out\n", to_process-merge_offsets.size());
            }
        }
        state = 3;
@@ -324,9 +320,7 @@ struct snap_merger_t
            processed++;
            if (parent->progress && !(processed % 128))
            {
-                fprintf(stderr, parent->color
-                    ? "\rOverwriting blocks: %ju/%ju"
-                    : "Overwriting blocks: %ju/%ju\n", processed, to_process);
+                printf("\rOverwriting blocks: %lu/%lu", processed, to_process);
            }
        }
        if (in_flight == 0 && rwo_error.size())
@@ -345,9 +339,7 @@ struct snap_merger_t
        }
        if (parent->progress)
        {
-            fprintf(stderr, parent->color
-                ? "\rOverwriting blocks: %ju/%ju\n"
-                : "Overwriting blocks: %ju/%ju\n", to_process, to_process);
+            printf("\rOverwriting blocks: %lu/%lu\n", to_process, to_process);
        }
        // Done
        result = (cli_result_t){ .text = "Done, layers from "+from_name+" to "+to_name+" merged into "+target_name };
@@ -392,7 +384,7 @@ struct snap_merger_t
                        auto & name = parent->cli->st_cli.inode_config.at(src).name;
                        if (parent->progress)
                        {
-                            printf("Got listing of layer %s (inode %ju in pool %u)\n", name.c_str(), INODE_NO_POOL(src), INODE_POOL(src));
+                            printf("Got listing of layer %s (inode %lu in pool %u)\n", name.c_str(), INODE_NO_POOL(src), INODE_POOL(src));
                        }
                        if (delete_source)
                        {
@@ -424,7 +416,7 @@ struct snap_merger_t
        {
            if (op->retval < 0)
            {
-                fprintf(stderr, "error reading target bitmap at offset %jx: %s\n", op->offset, strerror(-op->retval));
+                fprintf(stderr, "error reading target bitmap at offset %lx: %s\n", op->offset, strerror(-op->retval));
            }
            else
            {
@@ -579,7 +571,7 @@ struct snap_merger_t
        {
            if (subop->retval != 0)
            {
-                fprintf(stderr, "error deleting from layer 0x%jx at offset %jx: %s", subop->inode, subop->offset, strerror(-subop->retval));
+                fprintf(stderr, "error deleting from layer 0x%lx at offset %lx: %s", subop->inode, subop->offset, strerror(-subop->retval));
            }
            delete subop;
        };
@@ -628,7 +620,7 @@ struct snap_merger_t
            if (rwo->error_code)
            {
                char buf[1024];
-                snprintf(buf, 1024, "Error %s target at offset %jx: %s",
+                snprintf(buf, 1024, "Error %s target at offset %lx: %s",
                    rwo->error_read ? "reading" : "writing", rwo->error_offset, strerror(rwo->error_code));
                rwo_error = std::string(buf);
            }
@@ -15,7 +15,6 @@ struct image_changer_t
    uint64_t new_size = 0;
    bool force_size = false, inc_size = false;
    bool set_readonly = false, set_readwrite = false, force = false;
-    bool down_ok = false;
    // interval between fsyncs
    int fsync_interval = 128;

@@ -106,7 +105,6 @@ struct image_changer_t
                    { "pool", (uint64_t)INODE_POOL(inode_num) },
                    { "fsync-interval", fsync_interval },
                    { "min-offset", ((new_size+4095)/4096)*4096 },
-                    { "down-ok", down_ok },
                });
 resume_1:
                while (!cb(result))
@@ -242,7 +240,6 @@ std::function<bool(cli_result_t &)> cli_tool_t::start_modify(json11::Json cfg)
    changer->fsync_interval = cfg["fsync_interval"].uint64_value();
    if (!changer->fsync_interval)
        changer->fsync_interval = 128;
-    changer->down_ok = cfg["down_ok"].bool_value();
    // FIXME Check that the image doesn't have children when shrinking
    return [changer](cli_result_t & result)
    {
@@ -53,8 +53,6 @@ struct snap_remover_t
    int use_cas = 1;
    // interval between fsyncs
    int fsync_interval = 128;
-    // ignore deletion errors
-    bool down_ok = false;

    std::map<inode_t,int> sources;
    std::map<inode_t,uint64_t> inode_used;
@@ -293,7 +291,7 @@ resume_100:
            if (it == parent->cli->st_cli.inode_config.end())
            {
                char buf[1024];
-                snprintf(buf, 1024, "Parent inode of layer %s (id 0x%jx) not found", cur->name.c_str(), cur->parent_id);
+                snprintf(buf, 1024, "Parent inode of layer %s (id 0x%lx) not found", cur->name.c_str(), cur->parent_id);
                state = 100;
                return;
            }
@@ -386,7 +384,7 @@ resume_100:
                pool_id_t pool_id = 0;
                inode_t inode = 0;
                char null_byte = 0;
-                int scanned = sscanf(kv.key.c_str() + parent->cli->st_cli.etcd_prefix.length()+13, "%u/%ju%c", &pool_id, &inode, &null_byte);
+                int scanned = sscanf(kv.key.c_str() + parent->cli->st_cli.etcd_prefix.length()+13, "%u/%lu%c", &pool_id, &inode, &null_byte);
                if (scanned != 2 || !inode)
                {
                    result = (cli_result_t){ .err = EIO, .text = "Bad key returned from etcd: "+kv.key };
@@ -441,7 +439,7 @@ resume_100:
        if (child_it == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", inverse_child);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", inverse_child);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -450,7 +448,7 @@ resume_100:
        if (target_it == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", inverse_parent);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", inverse_parent);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -578,7 +576,7 @@ resume_100:
        if (cur_cfg_it == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", cur);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", cur);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -642,7 +640,7 @@ resume_100:
        if (child_it == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", child_inode);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", child_inode);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -651,7 +649,7 @@ resume_100:
        if (target_it == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", target_inode);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", target_inode);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -672,7 +670,7 @@ resume_100:
        if (source == parent->cli->st_cli.inode_config.end())
        {
            char buf[1024];
-            snprintf(buf, 1024, "Inode 0x%jx disappeared", inode);
+            snprintf(buf, 1024, "Inode 0x%lx disappeared", inode);
            result = (cli_result_t){ .err = EIO, .text = std::string(buf) };
            state = 100;
            return;
@@ -681,7 +679,6 @@ resume_100:
            { "inode", inode },
            { "pool", (uint64_t)INODE_POOL(inode) },
            { "fsync-interval", fsync_interval },
-            { "down-ok", down_ok },
        });
    }
 };
@@ -693,7 +690,6 @@ std::function<bool(cli_result_t &)> cli_tool_t::start_rm(json11::Json cfg)
    snap_remover->from_name = cfg["from"].string_value();
    snap_remover->to_name = cfg["to"].string_value();
    snap_remover->fsync_interval = cfg["fsync_interval"].uint64_value();
-    snap_remover->down_ok = cfg["down_ok"].bool_value();
    if (!snap_remover->fsync_interval)
        snap_remover->fsync_interval = 128;
    if (!cfg["cas"].is_null())
@@ -17,7 +17,6 @@ struct rm_pg_t
    uint64_t obj_count = 0, obj_done = 0;
    int state = 0;
    int in_flight = 0;
-    bool synced = false;
 };

 struct rm_inode_t
@@ -25,7 +24,6 @@ struct rm_inode_t
    uint64_t inode = 0;
    pool_id_t pool_id = 0;
    uint64_t min_offset = 0;
-    bool down_ok = false;

    cli_tool_t *parent = NULL;
    inode_list_t *lister = NULL;
@@ -50,7 +48,6 @@ struct rm_inode_t
                .objects = objects,
                .obj_count = objects.size(),
                .obj_done = 0,
-                .synced = parent->cli->get_immediate_commit(inode),
            });
            if (min_offset == 0)
            {
@@ -96,7 +93,7 @@ struct rm_inode_t
            fprintf(stderr, "Some data may remain after delete on OSDs which are currently down: ");
            for (int i = 0; i < inactive_osds.size(); i++)
            {
-                fprintf(stderr, i > 0 ? ", %ju" : "%ju", inactive_osds[i]);
+                fprintf(stderr, i > 0 ? ", %lu" : "%lu", inactive_osds[i]);
            }
            fprintf(stderr, "\n");
        }
@@ -139,7 +136,7 @@ struct rm_inode_t
                    cur_list->in_flight--;
                    if (op->reply.hdr.retval < 0)
                    {
-                        fprintf(stderr, "Failed to remove object %jx:%jx from PG %u (OSD %ju) (retval=%jd)\n",
+                        fprintf(stderr, "Failed to remove object %lx:%lx from PG %u (OSD %lu) (retval=%ld)\n",
                            op->req.rw.inode, op->req.rw.offset,
                            cur_list->pg_num, cur_list->rm_osd_num, op->reply.hdr.retval);
                        error_count++;
@@ -154,37 +151,6 @@ struct rm_inode_t
            }
            cur_list->obj_pos++;
        }
-        if (cur_list->in_flight == 0 && cur_list->obj_pos == cur_list->objects.end() &&
-            !cur_list->synced)
-        {
-            osd_op_t *op = new osd_op_t();
-            op->op_type = OSD_OP_OUT;
-            op->peer_fd = parent->cli->msgr.osd_peer_fds.at(cur_list->rm_osd_num);
-            op->req = (osd_any_op_t){
-                .sync = {
-                    .header = {
-                        .magic = SECONDARY_OSD_OP_MAGIC,
-                        .id = parent->cli->next_op_id(),
-                        .opcode = OSD_OP_SYNC,
-                    },
-                },
-            };
-            op->callback = [this, cur_list](osd_op_t *op)
-            {
-                cur_list->in_flight--;
-                cur_list->synced = true;
-                if (op->reply.hdr.retval < 0)
-                {
-                    fprintf(stderr, "Failed to sync OSD %ju (retval=%jd)\n",
-                        cur_list->rm_osd_num, op->reply.hdr.retval);
-                    error_count++;
-                }
-                delete op;
-                continue_delete();
-            };
-            cur_list->in_flight++;
-            parent->cli->msgr.outbox_push(op);
-        }
    }

    void continue_delete()
@@ -195,8 +161,7 @@ struct rm_inode_t
        }
        for (int i = 0; i < lists.size(); i++)
        {
-            if (!lists[i]->in_flight && lists[i]->obj_pos == lists[i]->objects.end() &&
-                lists[i]->synced)
+            if (!lists[i]->in_flight && lists[i]->obj_pos == lists[i]->objects.end())
            {
                delete lists[i];
                lists.erase(lists.begin()+i, lists.begin()+i+1);
@@ -213,9 +178,7 @@ struct rm_inode_t
        }
        if (parent->progress && total_count > 0 && total_done*1000/total_count != total_prev_pct)
        {
-            fprintf(stderr, parent->color
-                ? "\rRemoved %ju/%ju objects, %ju more PGs to list..."
-                : "Removed %ju/%ju objects, %ju more PGs to list...\n", total_done, total_count, pgs_to_list);
+            fprintf(stderr, "\rRemoved %lu/%lu objects, %lu more PGs to list...", total_done, total_count, pgs_to_list);
            total_prev_pct = total_done*1000/total_count;
        }
        if (lists_done && !lists.size())
@@ -224,18 +187,17 @@ struct rm_inode_t
            {
                fprintf(stderr, "\n");
            }
-            bool is_error = (total_done < total_count || inactive_osds.size() > 0 || error_count > 0);
-            if (parent->progress && is_error)
+            if (parent->progress && (total_done < total_count || inactive_osds.size() > 0))
            {
                fprintf(
-                    stderr, "Warning: Pool:%u,ID:%ju inode data may not have been fully removed.\n"
-                    "Use `vitastor-cli rm-data --pool %u --inode %ju` if you encounter it in listings.\n",
+                    stderr, "Warning: Pool:%u,ID:%lu inode data may not have been fully removed.\n"
+                    " Use `vitastor-cli rm-data --pool %u --inode %lu` if you encounter it in listings.\n",
                    pool_id, INODE_NO_POOL(inode), pool_id, INODE_NO_POOL(inode)
                );
            }
            result = (cli_result_t){
-                .err = is_error && !down_ok ? EIO : 0,
-                .text = is_error ? "Some blocks were not removed" : (
+                .err = error_count > 0 ? EIO : 0,
+                .text = error_count > 0 ? "Some blocks were not removed" : (
                    "Done, inode "+std::to_string(INODE_NO_POOL(inode))+" from pool "+
                    std::to_string(pool_id)+" removed"),
                .data = json11::Json::object {
@@ -284,7 +246,6 @@ std::function<bool(cli_result_t &)> cli_tool_t::start_rm_data(json11::Json cfg)
    {
        remover->inode = (remover->inode & (((uint64_t)1 << (64-POOL_ID_BITS)) - 1)) | (((uint64_t)remover->pool_id) << (64-POOL_ID_BITS));
    }
-    remover->down_ok = cfg["down_ok"].bool_value();
    remover->pool_id = INODE_POOL(remover->inode);
    remover->min_offset = cfg["min_offset"].uint64_value();
    return [remover](cli_result_t & result)
@@ -106,7 +106,7 @@ resume_2:
            if (etcd_states[i]["error"].is_null())
            {
                etcd_alive++;
-                etcd_db_size = etcd_states[i]["dbSize"].uint64_value();
+                etcd_db_size = etcd_states[i]["dbSizeInUse"].uint64_value();
            }
        }
        int mon_count = 0;
@@ -132,7 +132,7 @@ resume_2:
            auto kv = parent->cli->st_cli.parse_etcd_kv(osd_stats[i]);
            osd_num_t stat_osd_num = 0;
            char null_byte = 0;
-            int scanned = sscanf(kv.key.c_str() + parent->cli->st_cli.etcd_prefix.size(), "/osd/stats/%ju%c", &stat_osd_num, &null_byte);
+            int scanned = sscanf(kv.key.c_str() + parent->cli->st_cli.etcd_prefix.size(), "/osd/stats/%lu%c", &stat_osd_num, &null_byte);
            if (scanned != 1 || !stat_osd_num)
            {
                fprintf(stderr, "Invalid key in etcd: %s\n", kv.key.c_str());
@@ -283,7 +283,7 @@ resume_2:
        }
        printf(
            "  cluster:\n"
-            "    etcd: %d / %zd up, %s database size\n"
+            "    etcd: %d / %ld up, %s database size\n"
            "    mon:  %d up%s\n"
            "    osd:  %d / %d up\n"
            "  \n"
@@ -6,7 +6,7 @@
 #include "cluster_client_impl.h"
 #include "http_client.h" // json_is_true

-cluster_client_t::cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json & config)
+cluster_client_t::cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json config)
 {
    wb = new writeback_cache_t();

@@ -265,7 +265,7 @@ void cluster_client_t::erase_op(cluster_op_t *op)
    }
 }

-void cluster_client_t::continue_ops(int time_passed)
+void cluster_client_t::continue_ops(bool up_retry)
 {
    if (!pgs_loaded)
    {
@@ -277,27 +277,22 @@ void cluster_client_t::continue_ops(int time_passed)
        // Attempt to reenter the function
        return;
    }
-    int reset_duration = 0;
 restart:
    continuing_ops = 1;
    for (auto op = op_queue_head; op; )
    {
        cluster_op_t *next_op = op->next;
-        if (op->retry_after && time_passed)
+        if (!op->up_wait || up_retry)
        {
-            op->retry_after = op->retry_after > time_passed ? op->retry_after-time_passed : 0;
-            if (op->retry_after && (!reset_duration || op->retry_after < reset_duration))
+            op->up_wait = false;
+            if (!op->prev_wait)
            {
-                reset_duration = op->retry_after;
+                if (op->opcode == OSD_OP_SYNC)
+                    continue_sync(op);
+                else
+                    continue_rw(op);
            }
        }
-        if (!op->retry_after && !op->prev_wait)
-        {
-            if (op->opcode == OSD_OP_SYNC)
-                continue_sync(op);
-            else
-                continue_rw(op);
-        }
        op = next_op;
        if (continuing_ops == 2)
        {
@@ -305,27 +300,6 @@ restart:
        }
    }
    continuing_ops = 0;
-    reset_retry_timer(reset_duration);
-}
-
-void cluster_client_t::reset_retry_timer(int new_duration)
-{
-    if (retry_timeout_duration && retry_timeout_duration <= new_duration || !new_duration)
-    {
-        return;
-    }
-    if (retry_timeout_id)
-    {
-        tfd->clear_timer(retry_timeout_id);
-    }
-    retry_timeout_duration = new_duration;
-    retry_timeout_id = tfd->set_timer(retry_timeout_duration, false, [this](int)
-    {
-        int time_passed = retry_timeout_duration;
-        retry_timeout_id = 0;
-        retry_timeout_duration = 0;
-        continue_ops(time_passed);
-    });
 }

 void cluster_client_t::on_load_config_hook(json11::Json::object & etcd_global_config)
@@ -375,25 +349,15 @@ void cluster_client_t::on_load_config_hook(json11::Json::object & etcd_global_co
    {
        client_max_writeback_iodepth = DEFAULT_CLIENT_MAX_WRITEBACK_IODEPTH;
    }
-    // client_retry_interval
-    client_retry_interval = config["client_retry_interval"].uint64_value();
-    if (!client_retry_interval)
+    // up_wait_retry_interval
+    up_wait_retry_interval = config["up_wait_retry_interval"].uint64_value();
+    if (!up_wait_retry_interval)
    {
-        client_retry_interval = 50;
+        up_wait_retry_interval = 500;
    }
-    else if (client_retry_interval < 10)
+    else if (up_wait_retry_interval < 50)
    {
-        client_retry_interval = 10;
-    }
-    // client_eio_retry_interval
-    client_eio_retry_interval = 1000;
-    if (!config["client_eio_retry_interval"].is_null())
-    {
-        client_eio_retry_interval = config["client_eio_retry_interval"].uint64_value();
-        if (client_eio_retry_interval && client_eio_retry_interval < 10)
-        {
-            client_eio_retry_interval = 10;
-        }
+        up_wait_retry_interval = 50;
    }
    // log_level
    log_level = config["log_level"].uint64_value();
@@ -570,7 +534,7 @@ void cluster_client_t::execute_internal(cluster_op_t *op)
        return;
    }
    if (op->opcode == OSD_OP_WRITE && enable_writeback && !(op->flags & OP_FLUSH_BUFFER) &&
-        !op->version /* FIXME no CAS writeback */)
+        !op->version /* no CAS writeback */)
    {
        if (wb->writebacks_active >= client_max_writeback_iodepth)
        {
@@ -591,7 +555,7 @@ void cluster_client_t::execute_internal(cluster_op_t *op)
    }
    if (op->opcode == OSD_OP_WRITE && !(op->flags & OP_IMMEDIATE_COMMIT))
    {
-        if (!(op->flags & OP_FLUSH_BUFFER))
+        if (!(op->flags & OP_FLUSH_BUFFER) && !op->version /* no CAS write-repeat */)
        {
            wb->copy_write(op, CACHE_WRITTEN);
        }
@@ -752,8 +716,15 @@ resume_1:
                // We'll need to retry again
                if (op->parts[i].flags & PART_RETRY)
                {
-                    op->retry_after = client_retry_interval;
-                    reset_retry_timer(client_retry_interval);
+                    op->up_wait = true;
+                    if (!retry_timeout_id)
+                    {
+                        retry_timeout_id = tfd->set_timer(up_wait_retry_interval, false, [this](int)
+                        {
+                            retry_timeout_id = 0;
+                            continue_ops(true);
+                        });
+                    }
                }
                op->state = 1;
            }
@@ -809,9 +780,10 @@ resume_2:
        return 1;
    }
    else if (op->retval != 0 && !(op->flags & OP_FLUSH_BUFFER) &&
-        op->retval != -EPIPE && (op->retval != -EIO || !client_eio_retry_interval) && op->retval != -ENOSPC)
+        op->retval != -EPIPE && op->retval != -EIO && op->retval != -ENOSPC)
    {
        // Fatal error (neither -EPIPE, -EIO nor -ENOSPC)
+        // FIXME: Add a parameter to allow to not wait for EIOs (incomplete or corrupted objects) to heal
        erase_op(op);
        return 1;
    }
@@ -1184,27 +1156,31 @@ void cluster_client_t::handle_op_part(cluster_op_part_t *part)
            if (op->retval != -EPIPE || log_level > 0)
            {
                fprintf(
-                    stderr, "%s operation failed on OSD %ju: retval=%jd (expected %d), dropping connection\n",
+                    stderr, "%s operation failed on OSD %lu: retval=%ld (expected %d), dropping connection\n",
                    osd_op_names[part->op.req.hdr.opcode], part->osd_num, part->op.reply.hdr.retval, expected
                );
            }
        }
-        else
+        else if (log_level > 0)
        {
            fprintf(
-                stderr, "%s operation failed on OSD %ju: retval=%jd (expected %d)\n",
+                stderr, "%s operation failed on OSD %lu: retval=%ld (expected %d)\n",
                osd_op_names[part->op.req.hdr.opcode], part->osd_num, part->op.reply.hdr.retval, expected
            );
        }
        // All next things like timer, continue_sync/rw and stop_client may affect the operation again
        // So do all these things after modifying operation state, otherwise we may hit reenterability bugs
        // FIXME postpone such things to set_immediate here to avoid bugs
-        // Set op->retry_after to retry operation after a short pause (not immediately)
-        if (!op->retry_after)
+        // Mark op->up_wait = true to retry operation after a short pause (not immediately)
+        op->up_wait = true;
+        if (!retry_timeout_id)
        {
-            op->retry_after = op->retval == -EIO ? client_eio_retry_interval : client_retry_interval;
+            retry_timeout_id = tfd->set_timer(up_wait_retry_interval, false, [this](int)
+            {
+                retry_timeout_id = 0;
+                continue_ops(true);
+            });
        }
-        reset_retry_timer(op->retry_after);
        if (op->inflight_count == 0)
        {
            if (op->opcode == OSD_OP_SYNC)
@@ -59,7 +59,7 @@ protected:
    void *buf = NULL;
    cluster_op_t *orig_op = NULL;
    bool needs_reslice = false;
-    int retry_after = 0;
+    bool up_wait = false;
    int inflight_count = 0, done_count = 0;
    std::vector<cluster_op_part_t> parts;
    void *part_bitmaps = NULL;
@@ -92,11 +92,9 @@ class cluster_client_t
    uint64_t client_max_writeback_iodepth = 0;

    int log_level = 0;
-    int client_retry_interval = 50; // ms
-    int client_eio_retry_interval = 1000; // ms
+    int up_wait_retry_interval = 500; // ms

    int retry_timeout_id = 0;
-    int retry_timeout_duration = 0;
    std::vector<cluster_op_t*> offline_ops;
    cluster_op_t *op_queue_head = NULL, *op_queue_tail = NULL;
    writeback_cache_t *wb = NULL;
@@ -123,7 +121,7 @@ public:
    json11::Json::object cli_config, file_config, etcd_global_config;
    json11::Json::object config;

-    cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json & config);
+    cluster_client_t(ring_loop_t *ringloop, timerfd_manager_t *tfd, json11::Json config);
    ~cluster_client_t();
    void execute(cluster_op_t *op);
    void execute_raw(osd_num_t osd_num, osd_op_t *op);
@@ -133,7 +131,7 @@ public:

    bool get_immediate_commit(uint64_t inode);

-    void continue_ops(int time_passed = 0);
+    void continue_ops(bool up_retry = false);
    inode_list_t *list_inode_start(inode_t inode,
        std::function<void(inode_list_t* lst, std::set<object_id>&& objects, pg_num_t pg_num, osd_num_t primary_osd, int status)> callback);
    int list_pg_count(inode_list_t *lst);
@@ -154,7 +152,6 @@ protected:
    int continue_rw(cluster_op_t *op);
    bool check_rw(cluster_op_t *op);
    void slice_rw(cluster_op_t *op);
-    void reset_retry_timer(int new_duration);
    bool try_send(cluster_op_t *op, int i);
    int continue_sync(cluster_op_t *op);
    void send_sync(cluster_op_t *op, cluster_op_part_t *part);
@@ -226,7 +226,7 @@ void cluster_client_t::send_list(inode_list_osd_t *cur_list)
    {
        if (op->reply.hdr.retval < 0)
        {
-            fprintf(stderr, "Failed to get PG %u/%u object list from OSD %ju (retval=%jd), skipping\n",
+            fprintf(stderr, "Failed to get PG %u/%u object list from OSD %lu (retval=%ld), skipping\n",
                cur_list->pg->lst->pool_id, cur_list->pg->pg_num, cur_list->osd_num, op->reply.hdr.retval);
        }
        else
@@ -236,7 +236,7 @@ void cluster_client_t::send_list(inode_list_osd_t *cur_list)
                // Unstable objects, if present, mean that someone still writes into the inode. Warn the user about it.
                cur_list->pg->has_unstable = true;
                fprintf(
-                    stderr, "[PG %u/%u] Inode still has %ju unstable object versions out of total %ju - is it still open?\n",
+                    stderr, "[PG %u/%u] Inode still has %lu unstable object versions out of total %lu - is it still open?\n",
                    cur_list->pg->lst->pool_id, cur_list->pg->pg_num, op->reply.hdr.retval - op->reply.sec_list.stable_count,
                    op->reply.hdr.retval
                );
@@ -244,7 +244,7 @@ void cluster_client_t::send_list(inode_list_osd_t *cur_list)
            if (log_level > 0)
            {
                fprintf(
-                    stderr, "[PG %u/%u] Got inode object list from OSD %ju: %jd object versions\n",
+                    stderr, "[PG %u/%u] Got inode object list from OSD %lu: %ld object versions\n",
                    cur_list->pg->lst->pool_id, cur_list->pg->pg_num, cur_list->osd_num, op->reply.hdr.retval
                );
            }
@@ -47,7 +47,7 @@ void disk_tool_simple_offsets(json11::Json cfg, bool json_output)
    if (!bitmap_granularity)
        bitmap_granularity = DEFAULT_BITMAP_GRANULARITY;
    if (!journal_size)
-        journal_size = 32*1024*1024;
+        journal_size = 16*1024*1024;
    if (!device_block_size)
        device_block_size = 4096;
    if (!data_csum_type)
@@ -75,9 +75,9 @@ void disk_tool_simple_offsets(json11::Json cfg, bool json_output)
            if (st.st_blksize < device_block_size)
            {
                fprintf(
-                    stderr, "Warning: %s reports %ju byte blocks, but we use %ju."
-                    " Set --device_block_size=%ju if you're sure it works well with %ju byte blocks.\n",
-                    device.c_str(), (uint64_t)st.st_blksize, device_block_size, (uint64_t)st.st_blksize, (uint64_t)st.st_blksize
+                    stderr, "Warning: %s reports %lu byte blocks, but we use %lu."
+                    " Set --device_block_size=%lu if you're sure it works well with %lu byte blocks.\n",
+                    device.c_str(), st.st_blksize, device_block_size, st.st_blksize, st.st_blksize
                );
            }
        }
@@ -99,19 +99,19 @@ void disk_tool_simple_offsets(json11::Json cfg, bool json_output)
    if (device_block_size < 512 || device_block_size > 1048576 ||
        device_block_size & (device_block_size-1) != 0)
    {
-        fprintf(stderr, "Invalid device block size specified: %ju\n", device_block_size);
+        fprintf(stderr, "Invalid device block size specified: %lu\n", device_block_size);
        exit(1);
    }
    if (data_block_size < device_block_size || data_block_size > MAX_DATA_BLOCK_SIZE ||
        data_block_size & (data_block_size-1) != 0)
    {
-        fprintf(stderr, "Invalid object size specified: %ju\n", data_block_size);
+        fprintf(stderr, "Invalid object size specified: %lu\n", data_block_size);
        exit(1);
    }
    if (bitmap_granularity < device_block_size || bitmap_granularity > data_block_size ||
        bitmap_granularity & (bitmap_granularity-1) != 0)
    {
-        fprintf(stderr, "Invalid bitmap granularity specified: %ju\n", bitmap_granularity);
+        fprintf(stderr, "Invalid bitmap granularity specified: %lu\n", bitmap_granularity);
        exit(1);
    }
    if (csum_block_size && (data_block_size % csum_block_size))
@@ -145,8 +145,8 @@ void disk_tool_simple_offsets(json11::Json cfg, bool json_output)
    {
        // Env
        printf(
-            "meta_block_size=%ju\njournal_block_size=%ju\ndata_size=%ju\n"
-            "data_device=%s\njournal_offset=%ju\nmeta_offset=%ju\ndata_offset=%ju\n",
+            "meta_block_size=%lu\njournal_block_size=%lu\ndata_size=%lu\n"
+            "data_device=%s\njournal_offset=%lu\nmeta_offset=%lu\ndata_offset=%lu\n",
            device_block_size, device_block_size, device_size-data_offset,
            device.c_str(), journal_offset, meta_offset, data_offset
        );
@@ -160,14 +160,14 @@ void disk_tool_simple_offsets(json11::Json cfg, bool json_output)
        }
        if (device_block_size != 4096)
        {
-            printf("--meta_block_size %ju\n--journal_block_size %ju\n", device_block_size, device_block_size);
+            printf("--meta_block_size %lu\n--journal_block_size %lu\n", device_block_size, device_block_size);
        }
        if (orig_device_size)
        {
-            printf("--data_size %ju\n", device_size-data_offset);
+            printf("--data_size %lu\n", device_size-data_offset);
        }
        printf(
-            "--data_device %s\n--journal_offset %ju\n--meta_offset %ju\n--data_offset %ju\n",
+            "--data_device %s\n--journal_offset %lu\n--meta_offset %lu\n--data_offset %lu\n",
            device.c_str(), journal_offset, meta_offset, data_offset
        );
    }
@@ -167,7 +167,7 @@ static const char *help_text =
    "  Calculate offsets for old simple&stupid (no superblock) OSD deployment. Options:\n"
    "    --object_size 128k       Set blockstore block size\n"
    "    --bitmap_granularity 4k  Set bitmap granularity\n"
-    "    --journal_size 32M       Set journal size\n"
+    "    --journal_size 16M       Set journal size\n"
    "    --data_csum_type none    Set data checksum type (crc32c or none)\n"
    "    --csum_block_size 4k     Set data checksum block size\n"
    "    --device_block_size 4k   Set device block size\n"
@@ -4,7 +4,7 @@
 #pragma once

 #ifndef _LARGEFILE64_SOURCE
-#define _LARGEFILE64_SOURCE
+#define _LARGEFILE64_SOURCE 1
 #endif

 #include <map>
@@ -38,7 +38,7 @@ int disk_tool_t::dump_journal()
            }
            if (json)
            {
-                printf("%s{\"offset\":\"0x%jx\"", first_block ? "" : ",\n", journal_pos);
+                printf("%s{\"offset\":\"0x%lx\"", first_block ? "" : ",\n", journal_pos);
                first_block = false;
            }
            if (s == dsk.journal_block_size)
@@ -46,13 +46,13 @@ int disk_tool_t::dump_journal()
                if (json)
                    printf(",\"type\":\"zero\"}");
                else
-                    printf("offset %08jx: zeroes\n", journal_pos);
+                    printf("offset %08lx: zeroes\n", journal_pos);
                journal_pos += dsk.journal_block_size;
            }
            else if (((journal_entry*)journal_buf)->magic == JOURNAL_MAGIC)
            {
                if (!json)
-                    printf("offset %08jx:\n", journal_pos);
+                    printf("offset %08lx:\n", journal_pos);
                else
                    printf(",\"entries\":[\n");
                if (journal_pos == 0)
@@ -80,9 +80,9 @@ int disk_tool_t::dump_journal()
            else
            {
                if (json)
-                    printf(",\"type\":\"data\",\"pattern\":\"%08jx\"}", *((uint64_t*)journal_buf));
+                    printf(",\"type\":\"data\",\"pattern\":\"%08lx\"}", *((uint64_t*)journal_buf));
                else
-                    printf("offset %08jx: no magic in the beginning, looks like random data (pattern=%08jx)\n", journal_pos, *((uint64_t*)journal_buf));
+                    printf("offset %08lx: no magic in the beginning, looks like random data (pattern=%08lx)\n", journal_pos, *((uint64_t*)journal_buf));
                journal_pos += dsk.journal_block_size;
            }
        }
@@ -98,12 +98,12 @@ int disk_tool_t::dump_journal()
            if (json && dump_with_blocks)
                first_entry = true;
            if (!json)
-                printf("offset %08jx:\n", journal_pos);
+                printf("offset %08lx:\n", journal_pos);
            auto pos = journal_pos;
            int r = process_journal_block(data, [this, pos](int num, journal_entry *je)
            {
                if (json && dump_with_blocks && first_entry)
-                    printf("%s{\"offset\":\"0x%jx\",\"entries\":[\n", first_block ? "" : ",\n", pos);
+                    printf("%s{\"offset\":\"0x%lx\",\"entries\":[\n", first_block ? "" : ",\n", pos);
                dump_journal_entry(num, je, json);
                first_block = false;
            });
@@ -134,12 +134,12 @@ int disk_tool_t::process_journal(std::function<int(void*)> block_fn)
    journal_entry *je = (journal_entry*)(data);
    if (je->magic != JOURNAL_MAGIC || je->type != JE_START || je_crc32(je) != je->crc32)
    {
-        fprintf(stderr, "offset %08jx: journal superblock is invalid\n", journal_pos);
+        fprintf(stderr, "offset %08lx: journal superblock is invalid\n", journal_pos);
        r = 1;
    }
    else if (je->start.size != JE_START_V0_SIZE && je->start.version != JOURNAL_VERSION_V1 && je->start.version != JOURNAL_VERSION_V2)
    {
-        fprintf(stderr, "offset %08jx: journal superblock contains version %ju, but I only understand 0, 1 and 2\n",
+        fprintf(stderr, "offset %08lx: journal superblock contains version %lu, but I only understand 0, 1 and 2\n",
            journal_pos, je->start.size == JE_START_V0_SIZE ? 0 : je->start.version);
        r = 1;
    }
@@ -296,7 +296,7 @@ void disk_tool_t::dump_journal_entry(int num, journal_entry *je, bool json)
    if (je->type == JE_START)
    {
        printf(
-            json ? ",\"type\":\"start\",\"start\":\"0x%jx\"" : "je_start start=%08jx",
+            json ? ",\"type\":\"start\",\"start\":\"0x%lx\"" : "je_start start=%08lx",
            je->start.journal_start
        );
        if (je->start.data_csum_type)
@@ -312,15 +312,15 @@ void disk_tool_t::dump_journal_entry(int num, journal_entry *je, bool json)
    {
        auto & sw = je->small_write;
        printf(
-            json ? ",\"type\":\"small_write%s\",\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"ver\":\"%ju\",\"offset\":%u,\"len\":%u,\"loc\":\"0x%jx\""
-                : "je_small_write%s oid=%jx:%jx ver=%ju offset=%u len=%u loc=%08jx",
+            json ? ",\"type\":\"small_write%s\",\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"ver\":\"%lu\",\"offset\":%u,\"len\":%u,\"loc\":\"0x%lx\""
+                : "je_small_write%s oid=%lx:%lx ver=%lu offset=%u len=%u loc=%08lx",
            je->type == JE_SMALL_WRITE_INSTANT ? "_instant" : "",
            sw.oid.inode, sw.oid.stripe, sw.version, sw.offset, sw.len, sw.data_offset
        );
        if (journal_calc_data_pos != sw.data_offset)
        {
-            printf(json ? ",\"bad_loc\":true,\"calc_loc\":\"0x%jx\""
-                : " (mismatched, calculated = %08jx)", journal_pos);
+            printf(json ? ",\"bad_loc\":true,\"calc_loc\":\"0x%lx\""
+                : " (mismatched, calculated = %08lx)", journal_pos);
        }
        uint32_t data_csum_size = (!je_start.csum_block_size
            ? 0
@@ -367,8 +367,8 @@ void disk_tool_t::dump_journal_entry(int num, journal_entry *je, bool json)
    {
        auto & bw = je->big_write;
        printf(
-            json ? ",\"type\":\"big_write%s\",\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"ver\":\"%ju\",\"offset\":%u,\"len\":%u,\"loc\":\"0x%jx\""
-                : "je_big_write%s oid=%jx:%jx ver=%ju offset=%u len=%u loc=%08jx",
+            json ? ",\"type\":\"big_write%s\",\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"ver\":\"%lu\",\"offset\":%u,\"len\":%u,\"loc\":\"0x%lx\""
+                : "je_big_write%s oid=%lx:%lx ver=%lu offset=%u len=%u loc=%08lx",
            je->type == JE_BIG_WRITE_INSTANT ? "_instant" : "",
            bw.oid.inode, bw.oid.stripe, bw.version, bw.offset, bw.len, bw.location
        );
@@ -398,24 +398,24 @@ void disk_tool_t::dump_journal_entry(int num, journal_entry *je, bool json)
    else if (je->type == JE_STABLE)
    {
        printf(
-            json ? ",\"type\":\"stable\",\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"ver\":\"%ju\"}"
-                : "je_stable oid=%jx:%jx ver=%ju\n",
+            json ? ",\"type\":\"stable\",\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"ver\":\"%lu\"}"
+                : "je_stable oid=%lx:%lx ver=%lu\n",
            je->stable.oid.inode, je->stable.oid.stripe, je->stable.version
        );
    }
    else if (je->type == JE_ROLLBACK)
    {
        printf(
-            json ? ",\"type\":\"rollback\",\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"ver\":\"%ju\"}"
-                : "je_rollback oid=%jx:%jx ver=%ju\n",
+            json ? ",\"type\":\"rollback\",\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"ver\":\"%lu\"}"
+                : "je_rollback oid=%lx:%lx ver=%lu\n",
            je->rollback.oid.inode, je->rollback.oid.stripe, je->rollback.version
        );
    }
    else if (je->type == JE_DELETE)
    {
        printf(
-            json ? ",\"type\":\"delete\",\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"ver\":\"%ju\"}"
-                : "je_delete oid=%jx:%jx ver=%ju\n",
+            json ? ",\"type\":\"delete\",\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"ver\":\"%lu\"}"
+                : "je_delete oid=%lx:%lx ver=%lu\n",
            je->del.oid.inode, je->del.oid.stripe, je->del.version
        );
    }
@@ -54,7 +54,7 @@ int disk_tool_t::process_meta(std::function<void(blockstore_meta_header_v2_t *)>
        else
        {
            // Unsupported version
-            fprintf(stderr, "Metadata format is too new for me (stored version is %ju, max supported %u).\n", hdr->version, BLOCKSTORE_META_FORMAT_V2);
+            fprintf(stderr, "Metadata format is too new for me (stored version is %lu, max supported %u).\n", hdr->version, BLOCKSTORE_META_FORMAT_V2);
            free(data);
            close(dsk.meta_fd);
            dsk.meta_fd = -1;
@@ -108,7 +108,7 @@ int disk_tool_t::process_meta(std::function<void(blockstore_meta_header_v2_t *)>
                            uint32_t *entry_csum = (uint32_t*)((uint8_t*)entry + dsk.clean_entry_size - 4);
                            if (*entry_csum != crc32c(0, entry, dsk.clean_entry_size - 4))
                            {
-                                fprintf(stderr, "Metadata entry %ju is corrupt (checksum mismatch), skipping\n", block_num);
+                                fprintf(stderr, "Metadata entry %lu is corrupt (checksum mismatch), skipping\n", block_num);
                                continue;
                            }
                        }
@@ -184,7 +184,7 @@ void disk_tool_t::dump_meta_header(blockstore_meta_header_v2_t *hdr)
    }
    else
    {
-        printf("{\"version\":\"0.5\",\"meta_block_size\":%ju,\"entries\":[\n", dsk.meta_block_size);
+        printf("{\"version\":\"0.5\",\"meta_block_size\":%lu,\"entries\":[\n", dsk.meta_block_size);
    }
    first_entry = true;
 }
@@ -192,7 +192,7 @@ void disk_tool_t::dump_meta_header(blockstore_meta_header_v2_t *hdr)
 void disk_tool_t::dump_meta_entry(uint64_t block_num, clean_disk_entry *entry, uint8_t *bitmap)
 {
    printf(
-#define ENTRY_FMT "{\"block\":%ju,\"pool\":%u,\"inode\":\"0x%jx\",\"stripe\":\"0x%jx\",\"version\":%ju"
+#define ENTRY_FMT "{\"block\":%lu,\"pool\":%u,\"inode\":\"0x%lx\",\"stripe\":\"0x%lx\",\"version\":%lu"
        (first_entry ? ENTRY_FMT : (",\n" ENTRY_FMT)),
 #undef ENTRY_FMT
        block_num, INODE_POOL(entry->oid.inode), INODE_NO_POOL(entry->oid.inode),
@@ -265,7 +265,7 @@ int disk_tool_t::write_json_meta(json11::Json meta)
        {
            free(new_meta_buf);
            new_meta_buf = NULL;
-            fprintf(stderr, "Metadata (data block %ju) doesn't fit into the new area\n", data_block);
+            fprintf(stderr, "Metadata (data block %lu) doesn't fit into the new area\n", data_block);
            return 1;
        }
        clean_disk_entry *new_entry = (clean_disk_entry*)(new_meta_buf +
@@ -8,7 +8,6 @@
 int disk_tool_t::prepare_one(std::map<std::string, std::string> options, int is_hdd)
 {
    static const char *allow_additional_params[] = {
-        "autosync_writes",
        "data_io",
        "meta_io",
        "journal_io",
@@ -100,9 +99,12 @@ int disk_tool_t::prepare_one(std::map<std::string, std::string> options, int is_
        options["disable_journal_fsync"] = options["disable_data_fsync"];
    }
    // Calculate offsets if the same device is used for two or more of data, meta, and journal
-    if (options["journal_size"] == "" && (options["journal_device"] == "" || options["journal_device"] == options["data_device"]))
+    if (options["journal_size"] == "")
    {
-        options["journal_size"] = is_hdd || !json_is_true(options["disable_data_fsync"]) ? "128M" : "32M";
+        if (options["journal_device"] == "")
+            options["journal_size"] = is_hdd ? "128M" : "32M";
+        else if (is_hdd)
+            options["journal_size"] = DEFAULT_HYBRID_JOURNAL;
    }
    bool is_hybrid = is_hdd && options["journal_device"] != "" && options["journal_device"] != options["data_device"];
    if (is_hdd)
@@ -112,15 +114,6 @@ int disk_tool_t::prepare_one(std::map<std::string, std::string> options, int is_
        if (is_hybrid && options["throttle_small_writes"] == "")
            options["throttle_small_writes"] = "1";
    }
-    else if (!json_is_true(options["disable_data_fsync"]))
-    {
-        if (options.find("min_flusher_count") == options.end())
-            options["min_flusher_count"] = "32";
-        if (options.find("max_flusher_count") == options.end())
-            options["max_flusher_count"] = "256";
-        if (options.find("autosync_writes") == options.end())
-            options["autosync_writes"] = "512";
-    }
    json11::Json::object sb;
    blockstore_disk_t dsk;
    try
@@ -210,10 +203,10 @@ int disk_tool_t::prepare_one(std::map<std::string, std::string> options, int is_
        desc += " with metadata on "+realpath_str(options["meta_device"]);
    if (sep_j)
        desc += (sep_m ? " and journal on " : " with journal on ") + realpath_str(options["journal_device"]);
-    fprintf(stderr, "Initialized OSD %ju on %s\n", osd_num, desc.c_str());
+    fprintf(stderr, "Initialized OSD %lu on %s\n", osd_num, desc.c_str());
    if (shell_exec({ "systemctl", "enable", "--now", "vitastor-osd@"+std::to_string(osd_num) }, "", NULL, NULL) != 0)
    {
-        fprintf(stderr, "Failed to enable systemd unit vitastor-osd@%ju\n", osd_num);
+        fprintf(stderr, "Failed to enable systemd unit vitastor-osd@%lu\n", osd_num);
        return 1;
    }
    return 0;
@@ -337,7 +330,7 @@ json11::Json disk_tool_t::add_partitions(vitastor_dev_info_t & devinfo, std::vec
    std::string out;
    if (shell_exec({ "sfdisk", "--no-reread", "--force", devinfo.path }, script, &out, NULL) != 0)
    {
-        fprintf(stderr, "Failed to add %zu partition(s) with sfdisk\n", sizes.size());
+        fprintf(stderr, "Failed to add %lu partition(s) with sfdisk\n", sizes.size());
        return {};
    }
    // Get new partition table and find created partitions
@@ -352,7 +345,7 @@ json11::Json disk_tool_t::add_partitions(vitastor_dev_info_t & devinfo, std::vec
    }
    if (new_parts.size() != sizes.size())
    {
-        fprintf(stderr, "Failed to add %zu partition(s) with sfdisk: new partitions not found in table\n", sizes.size());
+        fprintf(stderr, "Failed to add %lu partition(s) with sfdisk: new partitions not found in table\n", sizes.size());
        return {};
    }
    // Check if new nodes exist and run partprobe if not
@@ -456,7 +449,7 @@ std::vector<std::string> disk_tool_t::get_new_data_parts(vitastor_dev_info_t & d
                    bool is_journal = sb["params"]["journal_device"].string_value() == part_path;
                    bool is_data = sb["params"]["data_device"].string_value() == part_path;
                    fprintf(
-                        stderr, "%s is already initialized for OSD %ju%s, skipping\n",
+                        stderr, "%s is already initialized for OSD %lu%s, skipping\n",
                        part["node"].string_value().c_str(), sb["params"]["osd_num"].uint64_value(),
                        (is_data ? " data" : (is_meta ? " meta" : (is_journal ? " journal" : "")))
                    );
@@ -539,7 +532,7 @@ int disk_tool_t::get_meta_partition(std::vector<vitastor_dev_info_t> & ssds, std
    if (sel < 0)
    {
        fprintf(
-            stderr, "Could not find free space for new SSD journal and metadata (need %ju + %ju MiB)\n",
+            stderr, "Could not find free space for new SSD journal and metadata (need %lu + %lu MiB)\n",
            meta_size/1024/1024, journal_size/1024/1024
        );
        return 1;
@@ -623,7 +616,6 @@ int disk_tool_t::prepare(std::vector<std::string> devices)
        options.erase("disable_meta_fsync");
        options.erase("disable_journal_fsync");
    }
-    auto journal_size = options["journal_size"];
    for (auto & dev: devinfo)
    {
        if (!hybrid || dev.is_hdd)
@@ -641,13 +633,11 @@ int disk_tool_t::prepare(std::vector<std::string> devices)
                    {
                        return 1;
                    }
-                    options.erase("journal_size");
                }
                // Treat all disks as SSDs if not in the hybrid mode
                prepare_one(options, dev.is_hdd ? 1 : 0);
                if (hybrid)
                {
-                    options["journal_size"] = journal_size;
                    options.erase("journal_device");
                    options.erase("meta_device");
                }
@@ -184,7 +184,7 @@ void disk_tool_t::resize_init(blockstore_meta_header_v2_t *hdr)
    }
    if (new_meta_len < dsk.meta_block_size*new_meta_blocks)
    {
-        fprintf(stderr, "New metadata area size is too small, should be at least %ju bytes\n", dsk.meta_block_size*new_meta_blocks);
+        fprintf(stderr, "New metadata area size is too small, should be at least %lu bytes\n", dsk.meta_block_size*new_meta_blocks);
        exit(1);
    }
    // Check that new metadata, journal and data areas don't overlap
@@ -289,7 +289,7 @@ int disk_tool_t::resize_copy_data()
                        if (data->res != dsk.data_block_size)
                        {
                            fprintf(
-                                stderr, "Failed to read %u bytes at %ju from %s: %s\n", dsk.data_block_size,
+                                stderr, "Failed to read %u bytes at %lu from %s: %s\n", dsk.data_block_size,
                                dsk.data_offset + moving_blocks[i].old_loc*dsk.data_block_size, dsk.data_device.c_str(),
                                data->res < 0 ? strerror(-data->res) : "short read"
                            );
@@ -314,7 +314,7 @@ int disk_tool_t::resize_copy_data()
                        if (data->res != dsk.data_block_size)
                        {
                            fprintf(
-                                stderr, "Failed to write %u bytes at %ju to %s: %s\n", dsk.data_block_size,
+                                stderr, "Failed to write %u bytes at %lu to %s: %s\n", dsk.data_block_size,
                                dsk.data_offset + moving_blocks[i].new_loc*dsk.data_block_size, dsk.data_device.c_str(),
                                data->res < 0 ? strerror(-data->res) : "short write"
                            );
@@ -43,8 +43,8 @@ int disk_tool_t::udev_import(std::string device)
    }
    uint64_t osd_num = sb["params"]["osd_num"].uint64_value();
    // Print variables for udev
-    printf("VITASTOR_OSD_NUM=%ju\n", osd_num);
-    printf("VITASTOR_ALIAS=osd%ju-%s\n", osd_num, sb["device_type"].string_value().c_str());
+    printf("VITASTOR_OSD_NUM=%lu\n", osd_num);
+    printf("VITASTOR_ALIAS=osd%lu-%s\n", osd_num, sb["device_type"].string_value().c_str());
    printf("VITASTOR_DATA_DEVICE=%s\n", udev_escape(sb["params"]["data_device"].string_value()).c_str());
    if (sb["real_meta_device"].string_value() != "" && sb["real_meta_device"] != sb["real_data_device"])
        printf("VITASTOR_META_DEVICE=%s\n", udev_escape(sb["params"]["meta_device"].string_value()).c_str());
@@ -466,12 +466,12 @@ int disk_tool_t::purge_devices(const std::vector<std::string> & devices)
                    close(fd);
                if (r != 0)
                {
-                    fprintf(stderr, "Failed to clear OSD %ju %s device %s superblock: %s\n",
+                    fprintf(stderr, "Failed to clear OSD %lu %s device %s superblock: %s\n",
                        sb["params"]["osd_num"].uint64_value(), dev_type.c_str(), dev.c_str(), strerror(errno));
                }
                else
                {
-                    fprintf(stderr, "OSD %ju %s device %s superblock cleared\n",
+                    fprintf(stderr, "OSD %lu %s device %s superblock cleared\n",
                        sb["params"]["osd_num"].uint64_value(), dev_type.c_str(), dev.c_str());
                }
                if (sb["params"][dev_type+"_device"].string_value().substr(0, 22) == "/dev/disk/by-partuuid/")
@@ -12,9 +12,9 @@ uint64_t sscanf_json(const char *fmt, const json11::Json & str)
 {
    uint64_t value = 0;
    if (fmt)
-        sscanf(str.string_value().c_str(), "%jx", &value);
+        sscanf(str.string_value().c_str(), "%lx", &value);
    else if (str.string_value().size() > 2 && (str.string_value()[0] == '0' && str.string_value()[1] == 'x'))
-        sscanf(str.string_value().c_str(), "0x%jx", &value);
+        sscanf(str.string_value().c_str(), "0x%lx", &value);
    else
        value = str.uint64_value();
    return value;
@@ -333,7 +333,7 @@ void etcd_state_client_t::start_etcd_watcher()
        etcd_watch_ws = NULL;
    }
    if (this->log_level > 1)
-        fprintf(stderr, "Trying to connect to etcd websocket at %s, watch from revision %ju\n", etcd_address.c_str(), etcd_watch_revision);
+        fprintf(stderr, "Trying to connect to etcd websocket at %s, watch from revision %lu\n", etcd_address.c_str(), etcd_watch_revision);
    etcd_watch_ws = open_websocket(tfd, etcd_address, etcd_api_path+"/watch", etcd_slow_timeout,
        [this, cur_addr = selected_etcd_address](const http_response_t *msg)
    {
@@ -357,7 +357,7 @@ void etcd_state_client_t::start_etcd_watcher()
                        watch_id == ETCD_OSD_STATE_WATCH_ID)
                        etcd_watches_initialised++;
                    if (etcd_watches_initialised == ETCD_TOTAL_WATCHES && this->log_level > 0)
-                        fprintf(stderr, "Successfully subscribed to etcd at %s, revision %ju\n", cur_addr.c_str(), etcd_watch_revision);
+                        fprintf(stderr, "Successfully subscribed to etcd at %s, revision %lu\n", cur_addr.c_str(), etcd_watch_revision);
                }
                if (data["result"]["canceled"].bool_value())
                {
@@ -371,7 +371,7 @@ void etcd_state_client_t::start_etcd_watcher()
                            // check to not trigger on_reload_hook multiple times
                            if (etcd_watch_ws != NULL)
                            {
-                                fprintf(stderr, "Revisions before %ju were compacted by etcd, reloading state\n",
+                                fprintf(stderr, "Revisions before %lu were compacted by etcd, reloading state\n",
                                    data["result"]["compact_revision"].uint64_value());
                                http_close(etcd_watch_ws);
                                etcd_watch_ws = NULL;
@@ -382,7 +382,7 @@ void etcd_state_client_t::start_etcd_watcher()
                        }
                        else
                        {
-                            fprintf(stderr, "Revisions before %ju were compacted by etcd, exiting\n",
+                            fprintf(stderr, "Revisions before %lu were compacted by etcd, exiting\n",
                                data["result"]["compact_revision"].uint64_value());
                            exit(1);
                        }
@@ -646,7 +646,7 @@ void etcd_state_client_t::load_pgs()
            etcd_watch_revision = data["header"]["revision"].uint64_value()+1;
            if (this->log_level > 3)
            {
-                fprintf(stderr, "Loaded revision %ju of PG configuration\n", etcd_watch_revision-1);
+                fprintf(stderr, "Loaded revision %lu of PG configuration\n", etcd_watch_revision-1);
            }
        }
        for (auto & res: data["responses"].array_items())
@@ -740,7 +740,7 @@ void etcd_state_client_t::clean_nonexistent_pgs()
    {
        if (seen_peers.find(peer_item.first) == seen_peers.end())
        {
-            fprintf(stderr, "OSD %ju state disappeared after reload, forgetting it\n", peer_item.first);
+            fprintf(stderr, "OSD %lu state disappeared after reload, forgetting it\n", peer_item.first);
            parse_state((etcd_kv_t){
                .key = etcd_prefix+"/osd/state/"+std::to_string(peer_item.first),
            });
@@ -890,7 +890,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
            {
                if (pg_item.second.target_set.size() != parsed_cfg.pg_size)
                {
-                    fprintf(stderr, "Pool %u PG %u configuration is invalid: osd_set size %zu != pool pg_size %ju\n",
+                    fprintf(stderr, "Pool %u PG %u configuration is invalid: osd_set size %lu != pool pg_size %lu\n",
                        pool_id, pg_item.first, pg_item.second.target_set.size(), parsed_cfg.pg_size);
                    pg_item.second.pause = true;
                }
@@ -936,7 +936,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
                }
                if (parsed_cfg.target_set.size() != pool_config[pool_id].pg_size)
                {
-                    fprintf(stderr, "Pool %u PG %u configuration is invalid: osd_set size %zu != pool pg_size %ju\n",
+                    fprintf(stderr, "Pool %u PG %u configuration is invalid: osd_set size %lu != pool pg_size %lu\n",
                        pool_id, pg_num, parsed_cfg.target_set.size(), pool_config[pool_id].pg_size);
                    parsed_cfg.pause = true;
                }
@@ -950,7 +950,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
                if (pg_it->second.config_exists && pg_it->first != ++n)
                {
                    fprintf(
-                        stderr, "Invalid pool %u PG configuration: PG numbers don't cover whole 1..%zu range\n",
+                        stderr, "Invalid pool %u PG configuration: PG numbers don't cover whole 1..%lu range\n",
                        pool_item.second.id, pool_item.second.pg_config.size()
                    );
                    for (pg_it = pool_item.second.pg_config.begin(); pg_it != pool_item.second.pg_config.end(); pg_it++)
@@ -1066,7 +1066,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
                (state & PG_PEERING) && state != PG_PEERING ||
                (state & PG_INCOMPLETE) && state != PG_INCOMPLETE)
            {
-                fprintf(stderr, "Unexpected pool %u PG %u state in etcd: primary=%ju, state=%s\n", pool_id, pg_num, cur_primary, value["state"].dump().c_str());
+                fprintf(stderr, "Unexpected pool %u PG %u state in etcd: primary=%lu, state=%s\n", pool_id, pg_num, cur_primary, value["state"].dump().c_str());
                return;
            }
            pg_cfg.cur_primary = cur_primary;
@@ -1102,7 +1102,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
        uint64_t pool_id = 0;
        uint64_t inode_num = 0;
        char null_byte = 0;
-        int scanned = sscanf(key.c_str() + etcd_prefix.length()+14, "%ju/%ju%c", &pool_id, &inode_num, &null_byte);
+        int scanned = sscanf(key.c_str() + etcd_prefix.length()+14, "%lu/%lu%c", &pool_id, &inode_num, &null_byte);
        if (scanned != 2 || !pool_id || pool_id >= POOL_ID_MAX || !inode_num || (inode_num >> (64-POOL_ID_BITS)))
        {
            fprintf(stderr, "Bad etcd key %s, ignoring\n", key.c_str());
@@ -1145,7 +1145,7 @@ void etcd_state_client_t::parse_state(const etcd_kv_t & kv)
                    else if (parent_pool_id >= POOL_ID_MAX)
                    {
                        fprintf(
-                            stderr, "Inode %ju/%ju parent_pool value is invalid, ignoring parent setting\n",
+                            stderr, "Inode %lu/%lu parent_pool value is invalid, ignoring parent setting\n",
                            inode_num >> (64-POOL_ID_BITS), inode_num & (((uint64_t)1 << (64-POOL_ID_BITS)) - 1)
                        );
                        parent_inode_num = 0;
@@ -28,7 +28,7 @@ struct etcd_kv_t
 {
    std::string key;
    json11::Json value;
-    uint64_t mod_revision = 0;
+    uint64_t mod_revision;
 };

 struct pg_config_t
@@ -377,7 +377,7 @@ static void io_callback(void *opaque, long retval)
    bsd->completed.push_back(io);
    if (bsd->trace)
    {
-        printf("--- %s 0x%jx retval=%ld\n", io->ddir == DDIR_READ ? "READ" :
+        printf("--- %s 0x%lx retval=%ld\n", io->ddir == DDIR_READ ? "READ" :
            (io->ddir == DDIR_WRITE ? "WRITE" : "SYNC"), (uint64_t)io, retval);
    }
 }
@@ -405,11 +405,10 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
    bsd->inflight++;

    uint64_t inode = opt->image ? vitastor_c_inode_get_num(bsd->watch) : opt->inode;
-    assert(io->xfer_buflen < (size_t)-1);
    switch (io->ddir)
    {
    case DDIR_READ:
-        iov = { .iov_base = io->xfer_buf, .iov_len = (size_t)io->xfer_buflen };
+        iov = { .iov_base = io->xfer_buf, .iov_len = io->xfer_buflen };
        vitastor_c_read(bsd->cli, inode, io->offset, io->xfer_buflen, &iov, 1, read_callback, io);
        bsd->last_sync = false;
        break;
@@ -437,7 +436,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
            io->error = EROFS;
            return FIO_Q_COMPLETED;
        }
-        iov = { .iov_base = io->xfer_buf, .iov_len = (size_t)io->xfer_buflen };
+        iov = { .iov_base = io->xfer_buf, .iov_len = io->xfer_buflen };
        vitastor_c_write(bsd->cli, inode, io->offset, io->xfer_buflen, 0, &iov, 1, io_callback, io);
        bsd->last_sync = false;
        break;
@@ -454,11 +453,11 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
    {
        if (io->ddir == DDIR_SYNC)
        {
-            printf("+++ SYNC 0x%jx\n", (uint64_t)io);
+            printf("+++ SYNC 0x%lx\n", (uint64_t)io);
        }
        else
        {
-            printf("+++ %s 0x%jx 0x%llx+%jx\n",
+            printf("+++ %s 0x%lx 0x%llx+%lx\n",
                io->ddir == DDIR_READ ? "READ" : "WRITE",
                (uint64_t)io, io->offset, (uint64_t)io->xfer_buflen);
        }
@@ -310,8 +310,7 @@ static enum fio_q_status sec_queue(struct thread_data *td, struct io_u *io)
    int iovcnt = 1, wtotal = OSD_PACKET_SIZE;
    if (io->ddir == DDIR_WRITE)
    {
-        assert(io->xfer_buflen <= 0x7fffffff);
-        iov[iovcnt++] = { .iov_base = io->xfer_buf, .iov_len = (size_t)io->xfer_buflen };
+        iov[iovcnt++] = { .iov_base = io->xfer_buf, .iov_len = io->xfer_buflen };
        wtotal += io->xfer_buflen;
    }
    if (sendv_blocking(bsd->connect_fd, iov, iovcnt,
@@ -342,13 +341,13 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
        read_blocking(bsd->connect_fd, reply.buf, OSD_PACKET_SIZE);
        if (reply.hdr.magic != SECONDARY_OSD_REPLY_MAGIC)
        {
-            fprintf(stderr, "bad reply: magic = %jx instead of %jx\n", reply.hdr.magic, SECONDARY_OSD_REPLY_MAGIC);
+            fprintf(stderr, "bad reply: magic = %lx instead of %lx\n", reply.hdr.magic, SECONDARY_OSD_REPLY_MAGIC);
            exit(1);
        }
        auto it = bsd->queue.find(reply.hdr.id);
        if (it == bsd->queue.end())
        {
-            fprintf(stderr, "bad reply: op id %jx missing in local queue\n", reply.hdr.id);
+            fprintf(stderr, "bad reply: op id %lx missing in local queue\n", reply.hdr.id);
            exit(1);
        }
        io_u* io = it->second->fio_op;
@@ -358,7 +357,7 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
        {
            if (reply.hdr.retval != io->xfer_buflen)
            {
-                fprintf(stderr, "Short read: retval = %jd instead of %ju\n", reply.hdr.retval, (uint64_t)io->xfer_buflen);
+                fprintf(stderr, "Short read: retval = %ld instead of %lu\n", reply.hdr.retval, (uint64_t)io->xfer_buflen);
                exit(1);
            }
            // Support bitmap
@@ -372,8 +371,7 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
                else
                    iov[iovcnt++] = { .iov_base = (void*)(bitmap = (uint64_t)malloc(reply.sec_rw.attr_len)), .iov_len = reply.sec_rw.attr_len };
            }
-            assert(io->xfer_buflen <= 0x7FFFFFFF);
-            iov[iovcnt++] = { .iov_base = io->xfer_buf, .iov_len = (size_t)io->xfer_buflen };
+            iov[iovcnt++] = { .iov_base = io->xfer_buf, .iov_len = io->xfer_buflen };
            readv_blocking(bsd->connect_fd, iov, iovcnt);
            if (reply.sec_rw.attr_len > 8)
            {
@@ -384,7 +382,7 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
        {
            if (reply.hdr.retval != io->xfer_buflen)
            {
-                fprintf(stderr, "Short write: retval = %jd instead of %ju\n", reply.hdr.retval, (uint64_t)io->xfer_buflen);
+                fprintf(stderr, "Short write: retval = %ld instead of %lu\n", reply.hdr.retval, (uint64_t)io->xfer_buflen);
                exit(1);
            }
        }
@@ -392,13 +390,13 @@ static int sec_getevents(struct thread_data *td, unsigned int min, unsigned int
        {
            if (reply.hdr.retval != 0)
            {
-                fprintf(stderr, "Sync failed: retval = %jd\n", reply.hdr.retval);
+                fprintf(stderr, "Sync failed: retval = %ld\n", reply.hdr.retval);
                exit(1);
            }
        }
        if (opt->trace)
        {
-            printf("--- %s # %ju\n", io->ddir == DDIR_READ ? "READ" :
+            printf("--- %s # %ld\n", io->ddir == DDIR_READ ? "READ" :
                (io->ddir == DDIR_WRITE ? "WRITE" : "SYNC"), reply.hdr.id);
        }
        bsd->completed.push_back(io);
@@ -0,0 +1,401 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+//
+// Vitastor shared key/value database test CLI
+
+#define _XOPEN_SOURCE
+#include <limits.h>
+
+#include <netinet/tcp.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+#include <fcntl.h>
+//#include <signal.h>
+
+#include "epoll_manager.h"
+#include "str_util.h"
+#include "kv_db.h"
+
+const char *exe_name = NULL;
+
+class kv_cli_t
+{
+public:
+    kv_dbw_t *db = NULL;
+    ring_loop_t *ringloop = NULL;
+    epoll_manager_t *epmgr = NULL;
+    cluster_client_t *cli = NULL;
+    bool interactive = false;
+    int in_progress = 0;
+    char *cur_cmd = NULL;
+    int cur_cmd_size = 0, cur_cmd_alloc = 0;
+    bool finished = false, eof = false;
+    json11::Json::object cfg;
+
+    ~kv_cli_t();
+
+    static json11::Json::object parse_args(int narg, const char *args[]);
+    void run(const json11::Json::object & cfg);
+    void read_cmd();
+    void next_cmd();
+    void handle_cmd(const std::string & cmd, std::function<void()> cb);
+};
+
+kv_cli_t::~kv_cli_t()
+{
+    if (cur_cmd)
+    {
+        free(cur_cmd);
+        cur_cmd = NULL;
+    }
+    cur_cmd_alloc = 0;
+    if (db)
+        delete db;
+    if (cli)
+    {
+        cli->flush();
+        delete cli;
+    }
+    if (epmgr)
+        delete epmgr;
+    if (ringloop)
+        delete ringloop;
+}
+
+json11::Json::object kv_cli_t::parse_args(int narg, const char *args[])
+{
+    json11::Json::object cfg;
+    for (int i = 1; i < narg; i++)
+    {
+        if (!strcmp(args[i], "-h") || !strcmp(args[i], "--help"))
+        {
+            printf(
+                "Vitastor Key/Value CLI\n"
+                "(c) Vitaliy Filippov, 2023+ (VNPL-1.1)\n"
+                "\n"
+                "USAGE: %s [--etcd_address ADDR] [OTHER OPTIONS]\n",
+                exe_name
+            );
+            exit(0);
+        }
+        else if (args[i][0] == '-' && args[i][1] == '-')
+        {
+            const char *opt = args[i]+2;
+            cfg[opt] = !strcmp(opt, "json") || i == narg-1 ? "1" : args[++i];
+        }
+    }
+    return cfg;
+}
+
+void kv_cli_t::run(const json11::Json::object & cfg)
+{
+    // Create client
+    ringloop = new ring_loop_t(512);
+    epmgr = new epoll_manager_t(ringloop);
+    cli = new cluster_client_t(ringloop, epmgr->tfd, cfg);
+    db = new kv_dbw_t(cli);
+    // Load image metadata
+    while (!cli->is_ready())
+    {
+        ringloop->loop();
+        if (cli->is_ready())
+            break;
+        ringloop->wait();
+    }
+    // Run
+    fcntl(0, F_SETFL, fcntl(0, F_GETFL, 0) | O_NONBLOCK);
+    try
+    {
+        epmgr->tfd->set_fd_handler(0, false, [this](int fd, int events)
+        {
+            if (events & EPOLLIN)
+            {
+                read_cmd();
+            }
+            if (events & EPOLLRDHUP)
+            {
+                epmgr->tfd->set_fd_handler(0, false, NULL);
+                finished = true;
+            }
+        });
+        interactive = true;
+        printf("> ");
+    }
+    catch (std::exception & e)
+    {
+        // Can't add to epoll, STDIN is probably a file
+        read_cmd();
+    }
+    while (!finished)
+    {
+        ringloop->loop();
+        if (!finished)
+            ringloop->wait();
+    }
+    // Destroy the client
+    delete db;
+    db = NULL;
+    cli->flush();
+    delete cli;
+    delete epmgr;
+    delete ringloop;
+    cli = NULL;
+    epmgr = NULL;
+    ringloop = NULL;
+}
+
+void kv_cli_t::read_cmd()
+{
+    if (!cur_cmd_alloc)
+    {
+        cur_cmd_alloc = 65536;
+        cur_cmd = (char*)malloc_or_die(cur_cmd_alloc);
+    }
+    while (cur_cmd_size < cur_cmd_alloc)
+    {
+        int r = read(0, cur_cmd+cur_cmd_size, cur_cmd_alloc-cur_cmd_size);
+        if (r < 0 && errno != EAGAIN)
+            fprintf(stderr, "Error reading from stdin: %s\n", strerror(errno));
+        if (r > 0)
+            cur_cmd_size += r;
+        if (r == 0)
+            eof = true;
+        if (r <= 0)
+            break;
+    }
+    next_cmd();
+}
+
+void kv_cli_t::next_cmd()
+{
+    if (in_progress > 0)
+    {
+        return;
+    }
+    int pos = 0;
+    for (; pos < cur_cmd_size; pos++)
+    {
+        if (cur_cmd[pos] == '\n' || cur_cmd[pos] == '\r')
+        {
+            auto cmd = trim(std::string(cur_cmd, pos));
+            pos++;
+            memmove(cur_cmd, cur_cmd+pos, cur_cmd_size-pos);
+            cur_cmd_size -= pos;
+            in_progress++;
+            handle_cmd(cmd, [this]()
+            {
+                in_progress--;
+                if (interactive)
+                    printf("> ");
+                next_cmd();
+                if (!in_progress)
+                    read_cmd();
+            });
+            break;
+        }
+    }
+    if (eof && !in_progress)
+    {
+        finished = true;
+    }
+}
+
+void kv_cli_t::handle_cmd(const std::string & cmd, std::function<void()> cb)
+{
+    if (cmd == "")
+    {
+        cb();
+        return;
+    }
+    auto pos = cmd.find_first_of(" \t");
+    if (pos != std::string::npos)
+    {
+        while (pos < cmd.size()-1 && (cmd[pos+1] == ' ' || cmd[pos+1] == '\t'))
+            pos++;
+    }
+    auto opname = strtolower(pos == std::string::npos ? cmd : cmd.substr(0, pos));
+    if (opname == "open")
+    {
+        uint64_t pool_id = 0;
+        inode_t inode_id = 0;
+        uint32_t kv_block_size = 0;
+        int scanned = sscanf(cmd.c_str() + pos+1, "%lu %lu %u", &pool_id, &inode_id, &kv_block_size);
+        if (scanned == 2)
+        {
+            kv_block_size = 4096;
+        }
+        if (scanned < 2 || !pool_id || !inode_id || !kv_block_size || (kv_block_size & (kv_block_size-1)) != 0)
+        {
+            fprintf(stderr, "Usage: open <pool_id> <inode_id> [block_size]. Block size must be a power of 2. Default is 4096.\n");
+            cb();
+            return;
+        }
+        cfg["kv_block_size"] = (uint64_t)kv_block_size;
+        db->open(INODE_WITH_POOL(pool_id, inode_id), cfg, [=](int res)
+        {
+            if (res < 0)
+                fprintf(stderr, "Error opening index: %s (code %d)\n", strerror(-res), res);
+            else
+                printf("Index opened. Current size: %lu bytes\n", db->get_size());
+            cb();
+        });
+    }
+    else if (opname == "config")
+    {
+        auto pos2 = cmd.find_first_of(" \t", pos+1);
+        if (pos2 == std::string::npos)
+        {
+            fprintf(stderr, "Usage: config <property> <value>\n");
+            cb();
+            return;
+        }
+        auto key = trim(cmd.substr(pos+1, pos2-pos-1));
+        auto value = parse_size(trim(cmd.substr(pos2+1)));
+        if (key != "kv_memory_limit" &&
+            key != "kv_allocate_blocks" &&
+            key != "kv_evict_max_misses" &&
+            key != "kv_evict_attempts_per_level" &&
+            key != "kv_evict_unused_age" &&
+            key != "kv_log_level")
+        {
+            fprintf(
+                stderr, "Allowed properties: kv_memory_limit, kv_allocate_blocks,"
+                " kv_evict_max_misses, kv_evict_attempts_per_level, kv_evict_unused_age, kv_log_level\n"
+            );
+        }
+        else
+        {
+            cfg[key] = value;
+            db->set_config(cfg);
+        }
+        cb();
+    }
+    else if (opname == "get" || opname == "set" || opname == "del")
+    {
+        if (opname == "get" || opname == "del")
+        {
+            if (pos == std::string::npos)
+            {
+                fprintf(stderr, "Usage: %s <key>\n", opname.c_str());
+                cb();
+                return;
+            }
+            auto key = trim(cmd.substr(pos+1));
+            if (opname == "get")
+            {
+                db->get(key, [this, cb](int res, const std::string & value)
+                {
+                    if (res < 0)
+                        fprintf(stderr, "Error: %s (code %d)\n", strerror(-res), res);
+                    else
+                    {
+                        write(1, value.c_str(), value.size());
+                        write(1, "\n", 1);
+                    }
+                    cb();
+                });
+            }
+            else
+            {
+                db->del(key, [this, cb](int res)
+                {
+                    if (res < 0)
+                        fprintf(stderr, "Error: %s (code %d)\n", strerror(-res), res);
+                    else
+                        printf("OK\n");
+                    cb();
+                });
+            }
+        }
+        else
+        {
+            auto pos2 = cmd.find_first_of(" \t", pos+1);
+            if (pos2 == std::string::npos)
+            {
+                fprintf(stderr, "Usage: set <key> <value>\n");
+                cb();
+                return;
+            }
+            auto key = trim(cmd.substr(pos+1, pos2-pos-1));
+            auto value = trim(cmd.substr(pos2+1));
+            db->set(key, value, [this, cb](int res)
+            {
+                if (res < 0)
+                    fprintf(stderr, "Error: %s (code %d)\n", strerror(-res), res);
+                else
+                    printf("OK\n");
+                cb();
+            });
+        }
+    }
+    else if (opname == "list")
+    {
+        std::string start, end;
+        if (pos != std::string::npos)
+        {
+            auto pos2 = cmd.find_first_of(" \t", pos+1);
+            if (pos2 != std::string::npos)
+            {
+                start = trim(cmd.substr(pos+1, pos2-pos-1));
+                end = trim(cmd.substr(pos2+1));
+            }
+            else
+            {
+                start = trim(cmd.substr(pos+1));
+            }
+        }
+        void *handle = db->list_start(start);
+        db->list_next(handle, [=](int res, const std::string & key, const std::string & value)
+        {
+            if (res < 0)
+            {
+                if (res != -ENOENT)
+                {
+                    fprintf(stderr, "Error: %s (code %d)\n", strerror(-res), res);
+                }
+                db->list_close(handle);
+                cb();
+            }
+            else
+            {
+                printf("%s = %s\n", key.c_str(), value.c_str());
+                db->list_next(handle, NULL);
+            }
+        });
+    }
+    else if (opname == "close")
+    {
+        db->close([=]()
+        {
+            printf("Index closed\n");
+            cb();
+        });
+    }
+    else if (opname == "quit" || opname == "q")
+    {
+        ::close(0);
+        finished = true;
+    }
+    else
+    {
+        fprintf(
+            stderr, "Unknown operation: %s. Supported operations:\n"
+            "open <pool_id> <inode_id> [block_size]\n"
+            "config <property> <value>\n"
+            "get <key>\nset <key> <value>\ndel <key>\nlist [<start> [end]]\n"
+            "close\nquit\n", opname.c_str()
+        );
+        cb();
+    }
+}
+
+int main(int narg, const char *args[])
+{
+    setvbuf(stdout, NULL, _IONBF, 0);
+    setvbuf(stderr, NULL, _IONBF, 0);
+    exe_name = args[0];
+    kv_cli_t *p = new kv_cli_t();
+    p->run(kv_cli_t::parse_args(narg, args));
+    delete p;
+    return 0;
+}
@@ -0,0 +1,39 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+//
+// Vitastor shared key/value database
+// Parallel optimistic B-Tree O:-)
+
+#pragma once
+
+#include "cluster_client.h"
+
+struct kv_db_t;
+
+struct kv_dbw_t
+{
+    kv_dbw_t(cluster_client_t *cli);
+    ~kv_dbw_t();
+
+    void open(inode_t inode_id, json11::Json cfg, std::function<void(int)> cb);
+    void set_config(json11::Json cfg);
+    void close(std::function<void()> cb);
+
+    uint64_t get_size();
+
+    void get(const std::string & key, std::function<void(int res, const std::string & value)> cb,
+        bool allow_old_cached = false);
+    void set(const std::string & key, const std::string & value, std::function<void(int res)> cb,
+        std::function<bool(int res, const std::string & value)> cas_compare = NULL);
+    void del(const std::string & key, std::function<void(int res)> cb,
+        std::function<bool(int res, const std::string & value)> cas_compare = NULL);
+    void update(const std::string & key,
+        std::function<int(int res, const std::string & old_value, std::string & new_value)> cas_compare,
+        std::function<bool(int res)> cb);
+
+    void* list_start(const std::string & start);
+    void list_next(void *handle, std::function<void(int res, const std::string & key, const std::string & value)> cb);
+    void list_close(void *handle);
+
+    kv_db_t *db;
+};
@@ -0,0 +1,697 @@
+// Copyright (c) Vitaliy Filippov, 2019+
+// License: VNPL-1.1 (see README.md for details)
+//
+// Vitastor shared key/value database stress tester / benchmark
+
+#define _XOPEN_SOURCE
+#include <limits.h>
+
+#include <netinet/tcp.h>
+#include <sys/epoll.h>
+#include <unistd.h>
+#include <fcntl.h>
+//#include <signal.h>
+
+#include "epoll_manager.h"
+#include "str_util.h"
+#include "kv_db.h"
+
+const char *exe_name = NULL;
+
+struct kv_test_listing_t
+{
+    uint64_t count = 0, done = 0;
+    void *handle = NULL;
+    std::string next_after;
+    std::set<std::string> inflights;
+    timespec tv_begin;
+    bool error = false;
+};
+
+struct kv_test_lat_t
+{
+    const char *name = NULL;
+    uint64_t usec = 0, count = 0;
+};
+
+struct kv_test_stat_t
+{
+    kv_test_lat_t get, add, update, del, list;
+    uint64_t list_keys = 0;
+};
+
+class kv_test_t
+{
+public:
+    // Config
+    json11::Json::object kv_cfg;
+    std::string key_prefix, key_suffix;
+    uint64_t inode_id = 0;
+    uint64_t op_count = 1000000;
+    uint64_t runtime_sec = 0;
+    uint64_t parallelism = 4;
+    uint64_t reopen_prob = 1;
+    uint64_t get_prob = 30000;
+    uint64_t add_prob = 20000;
+    uint64_t update_prob = 20000;
+    uint64_t del_prob = 5000;
+    uint64_t list_prob = 300;
+    uint64_t min_key_len = 10;
+    uint64_t max_key_len = 70;
+    uint64_t min_value_len = 50;
+    uint64_t max_value_len = 300;
+    uint64_t min_list_count = 10;
+    uint64_t max_list_count = 1000;
+    uint64_t print_stats_interval = 1;
+    bool json_output = false;
+    uint64_t log_level = 1;
+    bool trace = false;
+    bool stop_on_error = false;
+    // FIXME: Multiple clients
+    kv_test_stat_t stat, prev_stat;
+    timespec prev_stat_time, start_stat_time;
+
+    // State
+    kv_dbw_t *db = NULL;
+    ring_loop_t *ringloop = NULL;
+    epoll_manager_t *epmgr = NULL;
+    cluster_client_t *cli = NULL;
+    ring_consumer_t consumer;
+    bool finished = false;
+    uint64_t total_prob = 0;
+    uint64_t ops_sent = 0, ops_done = 0;
+    int stat_timer_id = -1;
+    int in_progress = 0;
+    bool reopening = false;
+    std::set<kv_test_listing_t*> listings;
+    std::set<std::string> changing_keys;
+    std::map<std::string, std::string> values;
+
+    ~kv_test_t();
+
+    static json11::Json::object parse_args(int narg, const char *args[]);
+    void parse_config(json11::Json cfg);
+    void run(json11::Json cfg);
+    void loop();
+    void print_stats(kv_test_stat_t & prev_stat, timespec & prev_stat_time);
+    void print_total_stats();
+    void start_change(const std::string & key);
+    void stop_change(const std::string & key);
+    void add_stat(kv_test_lat_t & stat, timespec tv_begin);
+};
+
+kv_test_t::~kv_test_t()
+{
+    if (db)
+        delete db;
+    if (cli)
+    {
+        cli->flush();
+        delete cli;
+    }
+    if (epmgr)
+        delete epmgr;
+    if (ringloop)
+        delete ringloop;
+}
+
+json11::Json::object kv_test_t::parse_args(int narg, const char *args[])
+{
+    json11::Json::object cfg;
+    for (int i = 1; i < narg; i++)
+    {
+        if (!strcmp(args[i], "-h") || !strcmp(args[i], "--help"))
+        {
+            printf(
+                "Vitastor Key/Value DB stress tester / benchmark\n"
+                "(c) Vitaliy Filippov, 2023+ (VNPL-1.1)\n"
+                "\n"
+                "USAGE: %s --pool_id POOL_ID --inode_id INODE_ID [OPTIONS]\n"
+                "  --op_count 1000000\n"
+                "    Total operations to run during test. 0 means unlimited\n"
+                "  --key_prefix \"\"\n"
+                "    Prefix for all keys read or written (to avoid collisions)\n"
+                "  --key_suffix \"\"\n"
+                "    Suffix for all keys read or written (to avoid collisions, but scan all DB)\n"
+                "  --runtime 0\n"
+                "    Run for this number of seconds. 0 means unlimited\n"
+                "  --parallelism 4\n"
+                "    Run this number of operations in parallel\n"
+                "  --get_prob 30000\n"
+                "    Fraction of key retrieve operations\n"
+                "  --add_prob 20000\n"
+                "    Fraction of key addition operations\n"
+                "  --update_prob 20000\n"
+                "    Fraction of key update operations\n"
+                "  --del_prob 30000\n"
+                "    Fraction of key delete operations\n"
+                "  --list_prob 300\n"
+                "    Fraction of listing operations\n"
+                "  --min_key_len 10\n"
+                "    Minimum key size in bytes\n"
+                "  --max_key_len 70\n"
+                "    Maximum key size in bytes\n"
+                "  --min_value_len 50\n"
+                "    Minimum value size in bytes\n"
+                "  --max_value_len 300\n"
+                "    Maximum value size in bytes\n"
+                "  --min_list_count 10\n"
+                "    Minimum number of keys read in listing (0 = all keys)\n"
+                "  --max_list_count 1000\n"
+                "    Maximum number of keys read in listing\n"
+                "  --print_stats 1\n"
+                "    Print operation statistics every this number of seconds\n"
+                "  --json\n"
+                "    JSON output\n"
+                "  --stop_on_error 0\n"
+                "    Stop on first execution error, mismatch, lost key or extra key during listing\n"
+                "  --kv_memory_limit 128M\n"
+                "    Maximum memory to use for vitastor-kv index cache\n"
+                "  --kv_allocate_blocks 4\n"
+                "    Number of PG blocks used for new tree block allocation in parallel\n"
+                "  --kv_evict_max_misses 10\n"
+                "    Eviction algorithm parameter: retry eviction from another random spot\n"
+                "    if this number of keys is used currently or was used recently\n"
+                "  --kv_evict_attempts_per_level 3\n"
+                "    Retry eviction at most this number of times per tree level, starting\n"
+                "    with bottom-most levels\n"
+                "  --kv_evict_unused_age 1000\n"
+                "    Evict only keys unused during this number of last operations\n"
+                "  --kv_log_level 1\n"
+                "    Log level. 0 = errors, 1 = warnings, 10 = trace operations\n",
+                exe_name
+            );
+            exit(0);
+        }
+        else if (args[i][0] == '-' && args[i][1] == '-')
+        {
+            const char *opt = args[i]+2;
+            cfg[opt] = !strcmp(opt, "json") || i == narg-1 ? "1" : args[++i];
+        }
+    }
+    return cfg;
+}
+
+void kv_test_t::parse_config(json11::Json cfg)
+{
+    inode_id = INODE_WITH_POOL(cfg["pool_id"].uint64_value(), cfg["inode_id"].uint64_value());
+    if (cfg["op_count"].uint64_value() > 0)
+        op_count = cfg["op_count"].uint64_value();
+    key_prefix = cfg["key_prefix"].string_value();
+    key_suffix = cfg["key_suffix"].string_value();
+    if (cfg["runtime"].uint64_value() > 0)
+        runtime_sec = cfg["runtime"].uint64_value();
+    if (cfg["parallelism"].uint64_value() > 0)
+        parallelism = cfg["parallelism"].uint64_value();
+    if (!cfg["reopen_prob"].is_null())
+        reopen_prob = cfg["reopen_prob"].uint64_value();
+    if (!cfg["get_prob"].is_null())
+        get_prob = cfg["get_prob"].uint64_value();
+    if (!cfg["add_prob"].is_null())
+        add_prob = cfg["add_prob"].uint64_value();
+    if (!cfg["update_prob"].is_null())
+        update_prob = cfg["update_prob"].uint64_value();
+    if (!cfg["del_prob"].is_null())
+        del_prob = cfg["del_prob"].uint64_value();
+    if (!cfg["list_prob"].is_null())
+        list_prob = cfg["list_prob"].uint64_value();
+    if (!cfg["min_key_len"].is_null())
+        min_key_len = cfg["min_key_len"].uint64_value();
+    if (cfg["max_key_len"].uint64_value() > 0)
+        max_key_len = cfg["max_key_len"].uint64_value();
+    if (!cfg["min_value_len"].is_null())
+        min_value_len = cfg["min_value_len"].uint64_value();
+    if (cfg["max_value_len"].uint64_value() > 0)
+        max_value_len = cfg["max_value_len"].uint64_value();
+    if (!cfg["min_list_count"].is_null())
+        min_list_count = cfg["min_list_count"].uint64_value();
+    if (!cfg["max_list_count"].is_null())
+        max_list_count = cfg["max_list_count"].uint64_value();
+    if (!cfg["print_stats"].is_null())
+        print_stats_interval = cfg["print_stats"].uint64_value();
+    if (!cfg["json"].is_null())
+        json_output = true;
+    if (!cfg["stop_on_error"].is_null())
+        stop_on_error = cfg["stop_on_error"].bool_value();
+    if (!cfg["kv_memory_limit"].is_null())
+        kv_cfg["kv_memory_limit"] = cfg["kv_memory_limit"];
+    if (!cfg["kv_allocate_blocks"].is_null())
+        kv_cfg["kv_allocate_blocks"] = cfg["kv_allocate_blocks"];
+    if (!cfg["kv_evict_max_misses"].is_null())
+        kv_cfg["kv_evict_max_misses"] = cfg["kv_evict_max_misses"];
+    if (!cfg["kv_evict_attempts_per_level"].is_null())
+        kv_cfg["kv_evict_attempts_per_level"] = cfg["kv_evict_attempts_per_level"];
+    if (!cfg["kv_evict_unused_age"].is_null())
+        kv_cfg["kv_evict_unused_age"] = cfg["kv_evict_unused_age"];
+    if (!cfg["kv_log_level"].is_null())
+    {
+        log_level = cfg["kv_log_level"].uint64_value();
+        trace = log_level >= 10;
+        kv_cfg["kv_log_level"] = cfg["kv_log_level"];
+    }
+    total_prob = reopen_prob+get_prob+add_prob+update_prob+del_prob+list_prob;
+    stat.get.name = "get";
+    stat.add.name = "add";
+    stat.update.name = "update";
+    stat.del.name = "del";
+    stat.list.name = "list";
+}
+
+void kv_test_t::run(json11::Json cfg)
+{
+    srand48(time(NULL));
+    parse_config(cfg);
+    // Create client
+    ringloop = new ring_loop_t(512);
+    epmgr = new epoll_manager_t(ringloop);
+    cli = new cluster_client_t(ringloop, epmgr->tfd, cfg);
+    db = new kv_dbw_t(cli);
+    // Load image metadata
+    while (!cli->is_ready())
+    {
+        ringloop->loop();
+        if (cli->is_ready())
+            break;
+        ringloop->wait();
+    }
+    // Run
+    reopening = true;
+    db->open(inode_id, kv_cfg, [this](int res)
+    {
+        reopening = false;
+        if (res < 0)
+        {
+            fprintf(stderr, "ERROR: Open index: %d (%s)\n", res, strerror(-res));
+            exit(1);
+        }
+        if (trace)
+            printf("Index opened\n");
+        ringloop->wakeup();
+    });
+    consumer.loop = [this]() { loop(); };
+    ringloop->register_consumer(&consumer);
+    if (print_stats_interval)
+        stat_timer_id = epmgr->tfd->set_timer(print_stats_interval*1000, true, [this](int) { print_stats(prev_stat, prev_stat_time); });
+    clock_gettime(CLOCK_REALTIME, &start_stat_time);
+    prev_stat_time = start_stat_time;
+    while (!finished)
+    {
+        ringloop->loop();
+        if (!finished)
+            ringloop->wait();
+    }
+    if (stat_timer_id >= 0)
+        epmgr->tfd->clear_timer(stat_timer_id);
+    ringloop->unregister_consumer(&consumer);
+    // Print total stats
+    print_total_stats();
+    // Destroy the client
+    delete db;
+    db = NULL;
+    cli->flush();
+    delete cli;
+    delete epmgr;
+    delete ringloop;
+    cli = NULL;
+    epmgr = NULL;
+    ringloop = NULL;
+}
+
+static const char *base64_chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789@+/";
+
+std::string random_str(int len)
+{
+    std::string str;
+    str.resize(len);
+    for (int i = 0; i < len; i++)
+    {
+        str[i] = base64_chars[lrand48() % 64];
+    }
+    return str;
+}
+
+void kv_test_t::loop()
+{
+    if (reopening)
+    {
+        return;
+    }
+    if (ops_done >= op_count)
+    {
+        finished = true;
+    }
+    while (!finished && ops_sent < op_count && in_progress < parallelism)
+    {
+        uint64_t dice = (lrand48() % total_prob);
+        if (dice < reopen_prob)
+        {
+            reopening = true;
+            db->close([this]()
+            {
+                if (trace)
+                    printf("Index closed\n");
+                db->open(inode_id, kv_cfg, [this](int res)
+                {
+                    reopening = false;
+                    if (res < 0)
+                    {
+                        fprintf(stderr, "ERROR: Reopen index: %d (%s)\n", res, strerror(-res));
+                        finished = true;
+                        return;
+                    }
+                    if (trace)
+                        printf("Index reopened\n");
+                    ringloop->wakeup();
+                });
+            });
+            return;
+        }
+        else if (dice < reopen_prob+get_prob)
+        {
+            // get existing
+            auto key = random_str(max_key_len);
+            auto k_it = values.lower_bound(key);
+            if (k_it == values.end())
+                continue;
+            key = k_it->first;
+            if (changing_keys.find(key) != changing_keys.end())
+                continue;
+            in_progress++;
+            ops_sent++;
+            if (trace)
+                printf("get %s\n", key.c_str());
+            timespec tv_begin;
+            clock_gettime(CLOCK_REALTIME, &tv_begin);
+            db->get(key, [this, key, tv_begin](int res, const std::string & value)
+            {
+                add_stat(stat.get, tv_begin);
+                ops_done++;
+                in_progress--;
+                auto it = values.find(key);
+                if (res != (it == values.end() ? -ENOENT : 0))
+                {
+                    fprintf(stderr, "ERROR: get %s: %d (%s)\n", key.c_str(), res, strerror(-res));
+                    if (stop_on_error)
+                        exit(1);
+                }
+                else if (it != values.end() && value != it->second)
+                {
+                    fprintf(stderr, "ERROR: get %s: mismatch: %s vs %s\n", key.c_str(), value.c_str(), it->second.c_str());
+                    if (stop_on_error)
+                        exit(1);
+                }
+                ringloop->wakeup();
+            });
+        }
+        else if (dice < reopen_prob+get_prob+add_prob+update_prob)
+        {
+            bool is_add = false;
+            std::string key;
+            if (dice < reopen_prob+get_prob+add_prob)
+            {
+                // add
+                is_add = true;
+                uint64_t key_len = min_key_len + (max_key_len > min_key_len ? lrand48() % (max_key_len-min_key_len) : 0);
+                key = key_prefix + random_str(key_len) + key_suffix;
+            }
+            else
+            {
+                // update
+                key = random_str(max_key_len);
+                auto k_it = values.lower_bound(key);
+                if (k_it == values.end())
+                    continue;
+                key = k_it->first;
+            }
+            if (changing_keys.find(key) != changing_keys.end())
+                continue;
+            uint64_t value_len = min_value_len + (max_value_len > min_value_len ? lrand48() % (max_value_len-min_value_len) : 0);
+            auto value = random_str(value_len);
+            start_change(key);
+            ops_sent++;
+            in_progress++;
+            if (trace)
+                printf("set %s = %s\n", key.c_str(), value.c_str());
+            timespec tv_begin;
+            clock_gettime(CLOCK_REALTIME, &tv_begin);
+            db->set(key, value, [this, key, value, tv_begin, is_add](int res)
+            {
+                add_stat(is_add ? stat.add : stat.update, tv_begin);
+                stop_change(key);
+                ops_done++;
+                in_progress--;
+                if (res != 0)
+                {
+                    fprintf(stderr, "ERROR: set %s = %s: %d (%s)\n", key.c_str(), value.c_str(), res, strerror(-res));
+                    if (stop_on_error)
+                        exit(1);
+                }
+                else
+                {
+                    values[key] = value;
+                }
+                ringloop->wakeup();
+            }, NULL);
+        }
+        else if (dice < reopen_prob+get_prob+add_prob+update_prob+del_prob)
+        {
+            // delete
+            auto key = random_str(max_key_len);
+            auto k_it = values.lower_bound(key);
+            if (k_it == values.end())
+                continue;
+            key = k_it->first;
+            if (changing_keys.find(key) != changing_keys.end())
+                continue;
+            start_change(key);
+            ops_sent++;
+            in_progress++;
+            if (trace)
+                printf("del %s\n", key.c_str());
+            timespec tv_begin;
+            clock_gettime(CLOCK_REALTIME, &tv_begin);
+            db->del(key, [this, key, tv_begin](int res)
+            {
+                add_stat(stat.del, tv_begin);
+                stop_change(key);
+                ops_done++;
+                in_progress--;
+                if (res != 0)
+                {
+                    fprintf(stderr, "ERROR: del %s: %d (%s)\n", key.c_str(), res, strerror(-res));
+                    if (stop_on_error)
+                        exit(1);
+                }
+                else
+                {
+                    values.erase(key);
+                }
+                ringloop->wakeup();
+            }, NULL);
+        }
+        else if (dice < reopen_prob+get_prob+add_prob+update_prob+del_prob+list_prob)
+        {
+            // list
+            ops_sent++;
+            in_progress++;
+            auto key = random_str(max_key_len);
+            auto lst = new kv_test_listing_t;
+            auto k_it = values.lower_bound(key);
+            lst->count = min_list_count + (max_list_count > min_list_count ? lrand48() % (max_list_count-min_list_count) : 0);
+            lst->handle = db->list_start(k_it == values.begin() ? key_prefix : key);
+            lst->next_after = k_it == values.begin() ? key_prefix : key;
+            lst->inflights = changing_keys;
+            listings.insert(lst);
+            if (trace)
+                printf("list from %s\n", key.c_str());
+            clock_gettime(CLOCK_REALTIME, &lst->tv_begin);
+            db->list_next(lst->handle, [this, lst](int res, const std::string & key, const std::string & value)
+            {
+                if (log_level >= 11)
+                    printf("list: %s = %s\n", key.c_str(), value.c_str());
+                if (res >= 0 && key_prefix.size() && (key.size() < key_prefix.size() ||
+                    key.substr(0, key_prefix.size()) != key_prefix))
+                {
+                    // stop at this key
+                    res = -ENOENT;
+                }
+                if (res < 0 || (lst->count > 0 && lst->done >= lst->count))
+                {
+                    add_stat(stat.list, lst->tv_begin);
+                    if (res == 0)
+                    {
+                        // ok (done >= count)
+                    }
+                    else if (res != -ENOENT)
+                    {
+                        fprintf(stderr, "ERROR: list: %d (%s)\n", res, strerror(-res));
+                        lst->error = true;
+                    }
+                    else
+                    {
+                        auto k_it = lst->next_after == "" ? values.begin() : values.upper_bound(lst->next_after);
+                        while (k_it != values.end())
+                        {
+                            while (k_it != values.end() && lst->inflights.find(k_it->first) != lst->inflights.end())
+                                k_it++;
+                            if (k_it != values.end())
+                            {
+                                fprintf(stderr, "ERROR: list: missing key %s\n", (k_it++)->first.c_str());
+                                lst->error = true;
+                            }
+                        }
+                    }
+                    if (lst->error && stop_on_error)
+                        exit(1);
+                    ops_done++;
+                    in_progress--;
+                    db->list_close(lst->handle);
+                    delete lst;
+                    listings.erase(lst);
+                    ringloop->wakeup();
+                }
+                else
+                {
+                    stat.list_keys++;
+                    // Do not check modified keys in listing
+                    // Listing may return their old or new state
+                    if ((!key_suffix.size() || key.size() >= key_suffix.size() &&
+                        key.substr(key.size()-key_suffix.size()) == key_suffix) &&
+                        lst->inflights.find(key) == lst->inflights.end())
+                    {
+                        lst->done++;
+                        auto k_it = lst->next_after == "" ? values.begin() : values.upper_bound(lst->next_after);
+                        while (true)
+                        {
+                            while (k_it != values.end() && lst->inflights.find(k_it->first) != lst->inflights.end())
+                            {
+                                k_it++;
+                            }
+                            if (k_it == values.end() || k_it->first > key)
+                            {
+                                fprintf(stderr, "ERROR: list: extra key %s\n", key.c_str());
+                                lst->error = true;
+                                break;
+                            }
+                            else if (k_it->first < key)
+                            {
+                                fprintf(stderr, "ERROR: list: missing key %s\n", k_it->first.c_str());
+                                lst->error = true;
+                                lst->next_after = k_it->first;
+                                k_it++;
+                            }
+                            else
+                            {
+                                if (k_it->second != value)
+                                {
+                                    fprintf(stderr, "ERROR: list: mismatch: %s = %s but should be %s\n",
+                                        key.c_str(), value.c_str(), k_it->second.c_str());
+                                    lst->error = true;
+                                }
+                                lst->next_after = k_it->first;
+                                break;
+                            }
+                        }
+                    }
+                    db->list_next(lst->handle, NULL);
+                }
+            });
+        }
+    }
+}
+
+void kv_test_t::add_stat(kv_test_lat_t & stat, timespec tv_begin)
+{
+    timespec tv_end;
+    clock_gettime(CLOCK_REALTIME, &tv_end);
+    int64_t usec = (tv_end.tv_sec - tv_begin.tv_sec)*1000000 +
+        (tv_end.tv_nsec - tv_begin.tv_nsec)/1000;
+    if (usec > 0)
+    {
+        stat.usec += usec;
+        stat.count++;
+    }
+}
+
+void kv_test_t::print_stats(kv_test_stat_t & prev_stat, timespec & prev_stat_time)
+{
+    timespec cur_stat_time;
+    clock_gettime(CLOCK_REALTIME, &cur_stat_time);
+    int64_t usec = (cur_stat_time.tv_sec - prev_stat_time.tv_sec)*1000000 +
+        (cur_stat_time.tv_nsec - prev_stat_time.tv_nsec)/1000;
+    if (usec > 0)
+    {
+        kv_test_lat_t *lats[] = { &stat.get, &stat.add, &stat.update, &stat.del, &stat.list };
+        kv_test_lat_t *prev[] = { &prev_stat.get, &prev_stat.add, &prev_stat.update, &prev_stat.del, &prev_stat.list };
+        if (!json_output)
+        {
+            char buf[128] = { 0 };
+            for (int i = 0; i < sizeof(lats)/sizeof(lats[0]); i++)
+            {
+                snprintf(buf, sizeof(buf)-1, "%.1f %s/s (%lu us)", (lats[i]->count-prev[i]->count)*1000000.0/usec,
+                    lats[i]->name, (lats[i]->usec-prev[i]->usec)/(lats[i]->count-prev[i]->count > 0 ? lats[i]->count-prev[i]->count : 1));
+                int k;
+                for (k = strlen(buf); k < strlen(lats[i]->name)+21; k++)
+                    buf[k] = ' ';
+                buf[k] = 0;
+                printf("%s", buf);
+            }
+            printf("\n");
+        }
+        else
+        {
+            int64_t runtime = (cur_stat_time.tv_sec - start_stat_time.tv_sec)*1000000 +
+                (cur_stat_time.tv_nsec - start_stat_time.tv_nsec)/1000;
+            printf("{\"runtime\":%.1f", (double)runtime/1000000.0);
+            for (int i = 0; i < sizeof(lats)/sizeof(lats[0]); i++)
+            {
+                if (lats[i]->count > prev[i]->count)
+                {
+                    printf(
+                        ",\"%s\":{\"avg\":{\"iops\":%.1f,\"usec\":%lu},\"total\":{\"count\":%lu,\"usec\":%lu}}",
+                        lats[i]->name, (lats[i]->count-prev[i]->count)*1000000.0/usec,
+                        (lats[i]->usec-prev[i]->usec)/(lats[i]->count-prev[i]->count),
+                        lats[i]->count, lats[i]->usec
+                    );
+                }
+            }
+            printf("}\n");
+        }
+    }
+    prev_stat = stat;
+    prev_stat_time = cur_stat_time;
+}
+
+void kv_test_t::print_total_stats()
+{
+    if (!json_output)
+        printf("Total:\n");
+    kv_test_stat_t start_stats;
+    timespec start_stat_time = this->start_stat_time;
+    print_stats(start_stats, start_stat_time);
+}
+
+void kv_test_t::start_change(const std::string & key)
+{
+    changing_keys.insert(key);
+    for (auto lst: listings)
+    {
+        lst->inflights.insert(key);
+    }
+}
+
+void kv_test_t::stop_change(const std::string & key)
+{
+    changing_keys.erase(key);
+}
+
+int main(int narg, const char *args[])
+{
+    setvbuf(stdout, NULL, _IONBF, 0);
+    setvbuf(stderr, NULL, _IONBF, 0);
+    exe_name = args[0];
+    kv_test_t *p = new kv_test_t();
+    p->run(kv_test_t::parse_args(narg, args));
+    delete p;
+    return 0;
+}
@@ -11,7 +11,7 @@ inline void* memalign_or_die(size_t alignment, size_t size)
    void *buf = memalign(alignment, size);
    if (!buf)
    {
-        printf("Failed to allocate %zu bytes\n", size);
+        printf("Failed to allocate %lu bytes\n", size);
        exit(1);
    }
    return buf;
@@ -22,7 +22,7 @@ inline void* malloc_or_die(size_t size)
    void *buf = malloc(size);
    if (!buf)
    {
-        printf("Failed to allocate %zu bytes\n", size);
+        printf("Failed to allocate %lu bytes\n", size);
        exit(1);
    }
    return buf;
@@ -33,7 +33,7 @@ inline void* realloc_or_die(void *ptr, size_t size)
    void *buf = realloc(ptr, size);
    if (!buf)
    {
-        printf("Failed to allocate %zu bytes\n", size);
+        printf("Failed to allocate %lu bytes\n", size);
        exit(1);
    }
    return buf;
@@ -44,7 +44,7 @@ inline void* calloc_or_die(size_t nmemb, size_t size)
    void *buf = calloc(nmemb, size);
    if (!buf)
    {
-        printf("Failed to allocate %zu bytes\n", size * nmemb);
+        printf("Failed to allocate %lu bytes\n", size * nmemb);
        exit(1);
    }
    return buf;
--- a/Show More
+++ b/Show More
Author	SHA1	Message	Date
Vitaliy Filippov	a9ef9a86c0	Add update() API to kv_db	2024-01-06 17:14:42 +03:00
Vitaliy Filippov	25832cb7e4	Fix eviction when random_pos selects the end	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	e6326c6539	Implement min/max list_count to make listings during performance test reasonable	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	e32f382815	Fix and improve parallel allocation - Do not try to allocate more DB blocks in an inode block until it's "confirmed" and "locked" by the first write - Do not recheck for new zero DB blocks on first write into an inode block - a CAS failure means someone else is already writing into it - Throw new allocation blocks away regardless of whether the known_version is 0 on a CAS failure	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	fb23d94000	Implement key_prefix for K/V stress test	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	ee462c2dad	More fixes - do not overwrite a block with older version if known version is newer (read may start before update and end after update) - invalidated block versions can't be remembered and trusted - right boundary for split blocks is right_half when diving down, not key_lt - restart update also when block is "invalidated", not just on version mismatch - copy callback in listings to avoid closure destruction bugs too	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	16e4c767f1	Add logging and one more assert	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	9e2b677499	Make get_block() wait for updating when unrelated block is found along the path	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	fd57096d2d	Fix a race condition where changed blocks were parsed over existing cached blocks and getting a mix of data	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	e5ae907256	Simplify code by removing an unneeded "optimisation"	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	64fd6f1c56	Add kv_log_level, print warnings on level 1, trace ops on level 10	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	6e76e09d16	Fix duplicate keys in listings on parallel updates -- do not rewind key "iterator position"	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	0964aeebd2	Implement key suffix to avoid collisions of multiple test workers	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	facff20ca1	Do not complain on empty first block	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	16e09745f0	Add JSON output for stress-tester	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	442f44a64f	Print total stats	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	c67e3d56cb	Do not send more than op_count operations (fix segfault on finish)	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	de41e46335	Add some more resiliency to serialize()	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	bf9a279ff9	Invalidate blocks being updated too	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	b7a41e6394	Change new block allocation method: make each writer choose multiple empty PG blocks and place blocks in them	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	4175cb3720	Remove blocks from cache on unsuccessful updates	2024-01-02 13:24:15 +03:00
Vitaliy Filippov	3a4b71b0cd	Allow to track multiple updates per block (it should never happen though)	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	34969c5919	Do not call stop_updating after failed write_new_block and after clear_block (both delete the item)	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	02a8df6586	Track versions of parent blocks and recheck if changed during update	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	86c6482cf3	Fix resume_split condition (key_lt can also be "")	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	4dd68c543c	Experiment: transform offsets for better sharding	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	10ad96c56c	More post-stress-test fixes - Prevent _split types of new blocks - Stop updating new blocks only after the whole update, otherwise pointers may become invalid - Use recheck_none for updates initially - Use UINT64_MAX as initial block version when postponing ops, otherwise the check fails when the block is initially empty. This for example leads to writing both leaf items & block pointers (which is incorrect) into the root block when starting stress-test with --parallelism 32 - Fix -EINTR comparison	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	6e451117ce	Print operation statistics	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	85f35bdf30	K/V fixes after stress-test :-) - track block versions correctly - per inode block (128kb) instead of tree block (4kb) - prevent multiple parallel CAS writes of the same inode block - add logging for EILSEQ which means invalid data in the tree - fix get_block updated flag which was true for blocks already in cache and was leading to infinite loops on "unrelated block" errors - apply changes to blocks in cache only after successful writes (using "virtual changes") - do not replace cached block with an older version from disk - recheck "unrelated blocks" (read/update collisions) until data stops changing - track tree path correctly - do not treat split block as parent of its right half - correctly move blocks when finding new empty place on disk - restart updates from the beginning when one of blocks is changed by a parallel update - fix delete using SET opcode and setting key to the empty value instead - prevent changing the same key more than 1 time in parallel - fix listing verification - resume continue_updates in update_find (required because it uses continue_update itself) - add allow_old_cached parameter to get()	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	09adaf62fd	Implement K/V DB stress tester	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	af93f8323c	Evict blocks based on memory limit & block usage	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	3d29c76ff4	Track blocks per level	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	19275379c1	Track block level	2024-01-02 13:24:14 +03:00
Vitaliy Filippov	96ad3c7c50	Experimental B-Tree Vitastor embedded K/V database implementation!	2024-01-02 13:24:14 +03:00