Gitweb:
https://sourceware.org/git/?p=lvm2.git;a=commitdiff;h=d49a20b7bdc9b741def...
Commit: d49a20b7bdc9b741def219be897c5057db5e05ff
Parent: 80900dcf76d2c91d8892e54913367bfed1012056
Author: David Teigland <teigland(a)redhat.com>
AuthorDate: Thu May 11 10:52:59 2017 -0500
Committer: David Teigland <teigland(a)redhat.com>
CommitterDate: Thu May 11 10:52:59 2017 -0500
man lvmcache: add info about metadata formats
---
man/lvmcache.7_main | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/man/lvmcache.7_main b/man/lvmcache.7_main
index e573b58..1f29185 100644
--- a/man/lvmcache.7_main
+++ b/man/lvmcache.7_main
@@ -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),