shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2025-04-01 18:50:41 +03:00
Code Releases Activity

Thin extend lvcreate man page about snapshot support

Browse Source
This commit is contained in:
Zdenek Kabelac 2012-01-20 10:50:39 +00:00
parent b2b316ab51
commit 43254b1185
1 changed files with 9 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
man/lvcreate.8.in
View File

@ -81,9 +81,7 @@ lvcreate \- create a logical volume in an existing volume group
.RB [ \-n | \-\-name
.IR SnapshotLogicalVolume { Name | Path }]
.BR \-s | \-\-snapshot
.RI { OriginalLogicalVolume { Name | Path }
|
.IR VolumeGroup { Name | Path }
.RI {[ VolumeGroup { Name | Path }/] OriginalLogicalVolumeName
.BR \-V | \-\-virtualsize
.IR VirtualSize [ bBsSkKmMgGtTpPeE ]}
.br
@ -241,16 +239,19 @@ a suitable value automatically.
A mirror is divided into regions of this size (in MB), and the mirror log
uses this granularity to track which regions are in sync.
.TP
.IR \fB\-s ", " \fB\-\-snapshot " " OriginalLogicalVolume { Name | Path }
.RI "| " VolumeGroup { Name | Path }
.IR \fB\-s ", " \fB\-\-snapshot " " OriginalLogicalVolume { Name | Path }
Create a snapshot logical volume (or snapshot) for an existing, so called
original logical volume (or origin).
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. The snapshot
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
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 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
.BR lvextend (8)
to grow it. Shrinking a snapshot is supported by
.BR lvreduce (8)