Author: Zdenek Kabelac <zkabelac(a)redhat.com>
AuthorDate: Mon Apr 25 13:38:24 2016 +0200
Committer: Zdenek Kabelac <zkabelac(a)redhat.com>
CommitterDate: Tue Apr 26 23:29:58 2016 +0200
man: lvcreate doc passthrough
Add few more words about passthough mode.
man/lvcreate.8.in | 5 ++++-
1 files changed, 4 insertions(+), 1 deletions(-)
diff --git a/man/lvcreate.8.in b/man/lvcreate.8.in
index f6bb14f..fd8b3a7 100644
@@ -219,7 +219,10 @@ If \fBwritethough\fP is specified, a write is considered complete
when it has been stored in the cache pool LV and on the origin LV.
While \fBwritethrough\fP may be slower for writes, it is more
resilient if something should happen to a device associated with the
-cache pool LV.
+cache pool LV. With \fBpassthrough\fP mode, all reads are served
+from origin LV (all reads miss the cache) and all writes are
+forwarded to the origin LV; additionally, write hits cause cache
+block invalidates. See \fBlvmcache(7)\fP for more details.