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man8/cache_writeback.txt
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Ming-Hung Tsai
[man] Fix the buffer size descriptions for cache_writeback
30 июл 2024, 17:47
30 июл 2024, 17:47
02153a0
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NAME cache_writeback - writeback dirty blocks to the origin device. SYNOPSIS cache_writeback [options] --metadata-device {device|file} --origin-device {device|file} --fast-device {device|file} DESCRIPTION cache_writeback is an offline tool that writes back dirty data to the data device (origin). Intended for use in recovery scenarios when the SSD is giving IO errors. This tool cannot be run on a live cache. OPTIONS -h, --help Print help and exit. -V, --version Print version information and exit. --metadata-device {device|file} Location of cache metadata. --origin-device {device|file} Slow device being cached. --fast-device {device|file} Fast device containing the data that needs to be written back. --no-metadata-update Do not update the metadata to clear the dirty flags. You may want to use this flag if you're decommissioning the cache. --buffer-size-meg {size} Specify the size for the data cache, in megabytes. Defaults to 64 MiB, a larger size may improve performance. --list-failed-blocks List any blocks that failed the writeback process. SEE ALSO cache_dump(8), cache_check(8), cache_repair(8), cache_restore(8) AUTHOR Joe Thornber <ejt@redhat.com>