snapshot
how lvm snapshot works? I noticed that
[root@rhel5 proc]# lvconvert --merge /dev/VolGroup00/rootsnap
Can't merge over open origin volume
Can't initialize snapshot merge. Missing support in kernel?
Unable to merge LV "rootsnap" into its origin.
[root@rhel5 proc]#
[root@rhel5 proc]#
[root@rhel5 proc]#
[root@rhel5 proc]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
LogVol00 VolGroup00 owi-ao 27.91G
LogVol01 VolGroup00 -wi-ao 1.97G
rootsnap VolGroup00 swi-a- 1.00G LogVol00 47.76
[root@rhel5 proc]# lvconvert --merge /dev/VolGroup00/rootsnap
Can't merge over open origin volume
Can't initialize snapshot merge. Missing support in kernel?
Unable to merge LV "rootsnap" into its origin.
[root@rhel5 proc]#
[root@rhel5 proc]#
[root@rhel5 proc]#
[root@rhel5 proc]# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
LogVol00 VolGroup00 owi-ao 27.91G
LogVol01 VolGroup00 -wi-ao 1.97G
rootsnap VolGroup00 swi-a- 1.00G LogVol00 47.76
ASKER
[root@rhel5 ~]# dmsetup targets
multipath v1.0.6
raid45 v1.0.0
snapshot-origin v1.6.0
snapshot v1.6.0
zero v1.0.0
mirror v1.2.0
striped v1.1.0
linear v1.0.2
error v1.0.1
multipath v1.0.6
raid45 v1.0.0
snapshot-origin v1.6.0
snapshot v1.6.0
zero v1.0.0
mirror v1.2.0
striped v1.1.0
linear v1.0.2
error v1.0.1
It doesn't look like it supports merge.
ASKER
which version support snapshot merge
ASKER CERTIFIED SOLUTION
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ASKER
when i take a snapshot what is really happening. can you give me some insight.
merge’ in the output of dmsetup targets."