On 06/01/2012 10:46 PM, 冷雨 wrote:
> i want take a snap for running system,how do i?
> now i can use qemu-img.exe to take a snapshot.
> and it not save the running memeory  info.
> 

Use the 'savevm' monitor command, if you are using qcow2 disk images.
It might also be possible to use 'migrate' to migrate running memory
info to a file in the background, and then when that completes use
'blockdev-snapshot-sync', as a way of cobbling together a complete
snapshot even if you don't use qcow2 disk images.

If you are using libvirt, then libvirt has wrapped these actions under
its virDomainSnapshotCreateXML API.

-- 
Eric Blake   eblake@redhat.com    +1-919-301-3266
Libvirt virtualization library http://libvirt.org