[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]

[libvirt] with latest libvirt(from git) on F18, time to take internal snapshot increases as snapshot count rises



Hi,

the below three internal snapshots were taken when the guest is running 'live'. Any hints
on why the time to take snapshots keep increasing ?
If you notice, the 2nd and 3rd internal snaphtots took more than 4 minutes each (note:
there is no noticeable content change from snap1 )

#==================================================#
[root localhost vmimages]# time virsh snapshot-create-as f17vm3-with-b snap1
snap1-f17vm3-desc
Domain snapshot snap1 created

real	0m57.734s
user	0m0.009s
sys	0m0.024s
[root localhost vmimages]#
[root localhost vmimages]# virsh snapshot-list f17vm3-with-b
 Name                 Creation Time             State
------------------------------------------------------------
 snap1                2012-10-04 06:55:38 -0400 running

[root localhost vmimages]#
#==================================================#
[root localhost vmimages]# time virsh snapshot-create-as f17vm3-with-b snap2
snap2-f17vm3-desc
Domain snapshot snap2 created

real	4m19.126s
user	0m0.020s
sys	0m0.030s
[root localhost vmimages]#
#==================================================#
[root localhost vmimages]# time virsh snapshot-create-as f17vm3-with-b snap3
snap3-f17vm3-desc
Domain snapshot snap3 created

real	4m45.053s
user	0m0.013s
sys	0m0.032s
[root localhost vmimages]#
#==================================================#
[root localhost qemu]# qemu-img info /home/kashyap/vmimages/f17vm3-with-b.qcow2
image: /home/kashyap/vmimages/f17vm3-with-b.qcow2
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 755M
cluster_size: 65536
backing file: /home/kashyap/vmimages/base-f17.qcow2
Snapshot list:
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         snap1                  232M 2012-10-04 06:55:38   19:58:19.804
2         snap2                  247M 2012-10-04 07:03:09   20:04:53.360
3         snap3                  244M 2012-10-04 07:08:23   20:05:48.889
4         snap4                     0 2012-10-04 08:51:16   00:00:00.000
5         snap5                     0 2012-10-04 08:53:04   00:00:00.000
[root localhost qemu]#
#==================================================#
[root localhost qemu]# virsh snapshot-list f17vm3-with-b
 Name                 Creation Time             State
------------------------------------------------------------
 snap1                2012-10-04 06:55:38 -0400 running
 snap2                2012-10-04 07:03:08 -0400 running
 snap3                2012-10-04 07:08:23 -0400 running
 snap4                2012-10-04 08:51:16 -0400 shutoff
 snap5                2012-10-04 08:53:04 -0400 shutoff

[root localhost qemu]#

#==================================================#

-- 
/kashyap


[Date Prev][Date Next]   [Thread Prev][Thread Next]   [Thread Index] [Date Index] [Author Index]