[libvirt-users] how to get disk snapshot size

[Yitao Jiang]

Hi,guys
I wanna to get the disk snapshot size, but found nothing libvirt commands
related,except qemu-img.
I create two disk snapshots, but nothing return its' size

[root at cskvm01 qcow2]# qemu-img info
 /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2
image:
/mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 1.0G
cluster_size: 65536
Snapshot list:
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         4fc42d73-8257-42bd-8807-81700fd3c689      0 2015-03-15 21:05:55
01:05:53.583
2         2fd6aeab-cb26-446d-b1c6-e8d70d33f651      0 2015-03-15 21:50:35
00:00:00.000

After wrote data to the disk, then create another snapshot
[root at cskvm01 qcow2]# qemu-img info
 /mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2
image:
/mnt/e6758700-af68-3c06-ade3-53f5f9b93507/e2cf6551-0d2c-4382-a86c-8ba633954ff2
file format: qcow2
virtual size: 5.0G (5368709120 bytes)
disk size: 3.9G
cluster_size: 65536
Snapshot list:
ID        TAG                 VM SIZE                DATE       VM CLOCK
1         4fc42d73-8257-42bd-8807-81700fd3c689      0 2015-03-15 21:05:55
01:05:53.583
2         2fd6aeab-cb26-446d-b1c6-e8d70d33f651      0 2015-03-15 21:50:35
00:00:00.000
3         63815565-3a06-4366-a1b3-bfeb9c4a07b4      0 2015-03-15 22:22:43
00:00:00.000

VM SIZE column still show 0

Here is my environment
qemu-img version 0.12.1, Copyright (c) 2004-2008 Fabrice Bellard
libvirtd (libvirt) 0.10.2
CentOS release 6.5 (Final) 2.6.32-431.el6.x86_64



---
Thanks,
Yitao(依涛 姜)
jiangyt.github.io
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