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thin: lvcreate man examples

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Add more examples to man page about thin volume snapshot creation
and try to make the text more explicit about size specification.
This commit is contained in:
Zdenek Kabelac 2013-07-15 11:52:05 +02:00
parent 97d36d5750
commit e1e986f16d
1 changed files with 15 additions and 7 deletions
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22
man/lvcreate.8.in
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@ -312,11 +312,11 @@ Snapshots provide a 'frozen image' of the contents of the origin
while the origin can still be updated. They enable consistent
backups and online recovery of removed/overwritten data/files.
Thin snapshot is created when the origin is a thin volume and
the size is not specified. Thin snapshot shares same blocks within
the size IS NOT specified. Thin snapshot shares same blocks within
the thin pool volume.
The snapshot with the specified size does not need the same amount of
storage the origin has. In a typical scenario, 15-20% might be enough.
In case the snapshot runs out of storage, use
The non thin volume snapshot with the specified size does not need
the same amount of storage the origin has. In a typical scenario,
15-20% might be enough. In case the snapshot runs out of storage, use
.BR lvextend (8)
to grow it. Shrinking a snapshot is supported by
.BR lvreduce (8)
@ -453,10 +453,18 @@ build with 2 stripes 64KiB and chunk size 256KiB together with
.sp
.B lvcreate \-i 2 \-I 64 \-c 256 \-L100M \-T vg00/pool \-V 1T \-\-name thin_lv
Creates thin volume snapshot of read only inactive volume "vg00/origin"
that will use an existing thin pool "vg00/pool":
Creates a thin snapshot volume "thinsnap" of thin volume "thinvol" that
will share the same blocks within the thin pool.
Note: the size MUST NOT be specified, otherwise the non-thin snapshot
is created instead:
.sp
.B lvcreate -s --thinpool "vg00/pool" origin
.B lvcreate -s vg00/thinvol --name thinsnap
Creates a thin snapshot volume of read-only inactive volume "origin"
which then becomes the thin external origin for the thin snapshot volume
in vg00 that will use an existing thin pool "vg00/pool":
.sp
.B lvcreate -s --thinpool vg00/pool origin
.SH SEE ALSO
.BR lvm (8),