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...nvoked prior to freezing the file system and just after thawing it (that is, qemu-guest-agent already has documented hooks that let you do any additional prep work beyond just freezing the file system). A quick google search found this: http://callecalle.uach.cl/ovirt-engine/docs/manual/en_US/html/Technical_Guide/QEMU_Guest_Agent_Overview.html Sadly, it didn't spell out the name of where you install hook scripts into the guest. But this commit is pretty telling: https://github.com/qemu/qemu/blob/master/scripts/qemu-guest-agent/fsfreeze-hook -- Eric Blake eblake redhat com +1-919-301-3266 Libvi...

...ile system and just > after thawing it (that is, qemu-guest-agent already has documented hooks > that let you do any additional prep work beyond just freezing the file > system). > > A quick google search found this: > http://callecalle.uach.cl/ovirt-engine/docs/manual/en_US/html/Technical_Guid > e/QEMU_Guest_Agent_Overview.html > > Sadly, it didn't spell out the name of where you install hook scripts > into the guest. But this commit is pretty telling: > https://github.com/qemu/qemu/blob/master/scripts/qemu-guest-agent/fsfreeze-h > ook Thank you very much Eric....

On Fri, Oct 10, 2014 at 07:32:06PM -0600, Eric Blake wrote: > On 10/10/2014 11:37 AM, Jd wrote: > > Hi > > Looking in to implementing (CBT like) delta backup for KVM. > > Not quite sure what you mean by CBT. > > > > > The following looks promising..(last paragraph) > > http://wiki.qemu.org/Features/Snapshots2 > > > > Libvirt