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Support custom hybrid OSD creation (--hybrid --fast-devices /dev/xxx,/dev/yyy)

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Vitaliy Filippov
2024-11-04 17:52:29 +03:00
parent adca162278
commit 56de4a520d
5 changed files with 108 additions and 56 deletions
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docs/usage/disk.en.md
+10 -6
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@@ -51,12 +51,16 @@ Options (automatic mode):
--osd_per_disk <N>
Create <N> OSDs on each disk (default 1)
--hybrid
Prepare hybrid (HDD+SSD) OSDs using provided devices. SSDs will be used for
journals and metadata, HDDs will be used for data. Partitions for journals and
metadata will be created automatically. Whether disks are SSD or HDD is decided
by the `/sys/block/.../queue/rotational` flag. In hybrid mode, default object
size is 1 MB instead of 128 KB, default journal size is 1 GB instead of 32 MB,
and throttle_small_writes is enabled by default.
Prepare hybrid (HDD+SSD, NVMe+SATA or etc) OSDs using provided devices. By default,
any passed SSDs will be used for journals and metadata, HDDs will be used for data,
but you can override this behaviour with --fast-devices option. Journal and metadata
partitions will be created automatically. In the default mode, SSD and HDD disks
are distinguished by the `/sys/block/.../queue/rotational` flag. When HDDs are used
for data in hybrid mode, default block_size is 1 MB instead of 128 KB, default journal
size is 1 GB instead of 32 MB, and throttle_small_writes is enabled by default.
--fast-devices /dev/nvmeX,/dev/nvmeY
In --hybrid mode, use these devices for journal and metadata instead of auto-detecting
and extracting them from the main [devices...] list.
--disable_data_fsync auto
Disable data device cache and fsync (1/yes/true = on, default auto)
--disable_meta_fsync auto