On 06/06/2012 07:05 AM, SimpleCloud wrote: > Thanks a lot for the details. > > > From http://wiki.libvirt.org/page/Snapshots, we have to pause the domain before taking snapshot and resume after. Actually, you don't have to do it yourself; libvirt takes care of doing it for you if that's what qemu requires, as part of the libvirt snapshot comand. > Is there any way to do "live" snapshotting for running domain or reduce pause time? You can do 'disk-only' snapshots instead of system checkpoints, which are much faster (less than 1 second, while system checkpoints can be seconds or even minutes long). And I'm also hoping to add code that will support external system checkpoints by doing a live migration to file coupled with a disk snapshot, which will hopefully reduce guest downtime compared to the current mandatory guest downtime of the qemu 'savevm' monitor command, but it may require qemu to implement more features first. -- Eric Blake eblake@xxxxxxxxxx +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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