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man lvmcache: add info about metadata formats

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David Teigland 2017-05-11 10:52:59 -05:00
parent 80900dcf76
commit d49a20b7bd
1 changed files with 18 additions and 0 deletions
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man/lvmcache.7_main
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@ -404,6 +404,24 @@ This is equivalent to:
.B lvconvert --type cache --cachepool VG/CachePoolLV VG/OriginLV
.SS Cache metadata formats
\&
There are two disk formats for cache metadata. The metadata format can be
specified when a cache pool is created, and cannot be changed.
Format \fB2\fP has better performance; it is more compact, and stores
dirty bits in a separate btree, which improves the speed of shutting down
the cache.
With \fBauto\fP, lvm selects the best option provided by the current
dm-cache kernel target.
.B lvconvert --type cache-pool --cachemetadataformat auto|1|2
.RS
.B VG/CacheDataLV
.RE
.SH SEE ALSO
.BR lvm.conf (5),
.BR lvchange (8),