Vitaliy Filippov
5524dbdab7
New features: - Implement CSI volume expansion - Implement CSI volume snapshots - CSI driver now requires Kubernetes >= 1.20 Bug fixes: - Important bug fix for EC: fix EC n+k, k>=2 read recovery in ISA-L version returning incorrect data when reading at least the second chunk out of multiple missing chunks without reading the first one. All users of EC n+k, k>=2 should upgrade as soon as possible, and upgrade should be conducted with downtime: first stop all clients (VMs/containers), then all OSDs, then upgrade and restart everything. - Fix unstable statistics aggregation in monitor (affecting vitastor-cli status and df) - Make udev not wait for OSDs to start during boot - Do not report negative numbers of offline PGs in vitastor-cli status when changing PG count - Report both old and new PG counts in vitastor-cli df when changing it - Fix OSDs sometimes not starting with "The code only supports journal versions 1 and 2, but it is 2 on disk" error after upgrading from pre-1.0 versions and letting OSDs run for some time - Fix monitors sometimes returning old PG count back after OSD configuration changes - Make monitor PG changes more stable and timeout errors less probable
Vitastor
The Idea
Make Clustered Block Storage Fast Again.
Vitastor is a distributed block SDS, direct replacement of Ceph RBD and internal SDS's of public clouds. However, in contrast to them, Vitastor is fast and simple at the same time. The only thing is it's slightly young :-).
Vitastor is architecturally similar to Ceph which means strong consistency, primary-replication, symmetric clustering and automatic data distribution over any number of drives of any size with configurable redundancy (replication or erasure codes/XOR).
Vitastor targets primarily SSD and SSD+HDD clusters with at least 10 Gbit/s network, supports TCP and RDMA and may achieve 4 KB read and write latency as low as ~0.1 ms with proper hardware which is ~10 times faster than other popular SDS's like Ceph or internal systems of public clouds.
Vitastor supports QEMU, NBD, NFS protocols, OpenStack, Proxmox, Kubernetes drivers. More drivers may be created easily.
Read more details below in the documentation.
Talks and presentations
- DevOpsConf'2021: presentation (in Russian, in English), video
- Highload'2022: presentation (in Russian), video
Documentation
- Introduction
- Installation
- Configuration
- Usage
- vitastor-cli (command-line interface)
- vitastor-disk (disk management tool)
- fio for benchmarks
- NBD for kernel mounts
- QEMU and qemu-img
- NFS emulator for VMWare and similar
- Performance
Author and License
Copyright (c) Vitaliy Filippov (vitalif [at] yourcmc.ru), 2019+
Join Vitastor Telegram Chat: https://t.me/vitastor
All server-side code (OSD, Monitor and so on) is licensed under the terms of Vitastor Network Public License 1.1 (VNPL 1.1), a copyleft license based on GNU GPLv3.0 with the additional "Network Interaction" clause which requires opensourcing all programs directly or indirectly interacting with Vitastor through a computer network and expressly designed to be used in conjunction with it ("Proxy Programs"). Proxy Programs may be made public not only under the terms of the same license, but also under the terms of any GPL-Compatible Free Software License, as listed by the Free Software Foundation. This is a stricter copyleft license than the Affero GPL.
Please note that VNPL doesn't require you to open the code of proprietary software running inside a VM if it's not specially designed to be used with Vitastor.
Basically, you can't use the software in a proprietary environment to provide its functionality to users without opensourcing all intermediary components standing between the user and Vitastor or purchasing a commercial license from the author 😀.
Client libraries (cluster_client and so on) are dual-licensed under the same VNPL 1.1 and also GNU GPL 2.0 or later to allow for compatibility with GPLed software like QEMU and fio.
You can find the full text of VNPL-1.1 in the file VNPL-1.1.txt. GPL 2.0 is also included in this repository as GPL-2.0.txt.