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| author | David Teigland <teigland@redhat.com> | 2022-12-08 16:42:04 -0600 |
|---|---|---|
| committer | David Teigland <teigland@redhat.com> | 2022-12-08 16:53:36 -0600 |
| commit | fa7fe5cbbe927d13a8b93aba24640ce5d8c11896 (patch) | |
| tree | d60e60cc263ffe4357c24bcd0ab71b94a6e46268 /man | |
| parent | 9ce55a43d0165da9827e7b8e75bf25583a571e89 (diff) | |
| download | lvm2-fa7fe5cbbe927d13a8b93aba24640ce5d8c11896.tar.gz | |
writecache: support settings metadata_only and pause_writeback
Two new settings for tuning dm-writecache.
Diffstat (limited to 'man')
| -rw-r--r-- | man/lvmcache.7_main | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/man/lvmcache.7_main b/man/lvmcache.7_main index d46c50d04..fdb375083 100644 --- a/man/lvmcache.7_main +++ b/man/lvmcache.7_main @@ -340,6 +340,21 @@ perform. If not done beforehand, the splitcache command enables the cleaner mode and waits for flushing to complete before detaching the writecache. Adding cleaner=0 to the splitcache command will skip the cleaner mode, and any required flushing is performed in device suspend. +. +.TP +max_age = <milliseconds> +Specifies the maximum age of a block in milliseconds. If a block is stored in +the cache for too long, it will be written to the underlying device and cleaned up. +. +.TP +metadata_only = 0|1 +Only metadata is promoted to the cache. This option improves performance for +heavier REQ_META workloads. +. +.TP +pause_writeback = <milliseconds> +Pause writeback if there was some write I/O redirected to the origin volume in +the last number of milliseconds. .SS dm-writecache using metadata profiles . |