On Tue, 03 Dec 2013 13:23:37 -0700 Eric Blake <eblake redhat com> wrote: > On 12/03/2013 12:37 PM, Michael Mol wrote: > > > A pity. Thin provisioning would be (as I see it) the first step to > > whole-VM snapshots as found in systems like VMWare ESX. I'd love to > > be able to pull that off using Linux/QEMU/KVM. Or at least be able > > to snapshot a running VM's disk to be able to pull backups off the > > snapshot without interrupting service in the VM guests. > > Ah, but you already CAN do that. Libvirt external snapshots (since > libvirt 1.0.5, or even earlier if you don't care about machine state > but just disk state) coupled with qemu 1.3 or newer is perfectly able > to create qcow2 chains such that you can do a backup of the snapshot > without any downtime to the guest. Admittedly, keeping things optimal > so that the qcow2 chain doesn't grow without bounds is a bit harder > problem, and qemu 1.7 has added some new functionality not yet > integrated into libvirt to make life easier for taking snapshots > without having to track the cleanup efforts. But your claim that > libvirt can't do online backups the way ESX can aren't quite true :) > Excellent to hear! Where can I find out more about how to handle cleanup? I don't need an automatic backup process requiring manual cleanup.
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