[libvirt] kvm savevm/loadvm

Jason Krieg jason.krieg at collax.com
Tue Jul 20 14:59:18 UTC 2010

On 07/20/2010 04:24 PM, Serge Hallyn wrote:
> Quoting Daniel P. Berrange (berrange at redhat.com):
>> On Tue, Jul 20, 2010 at 05:17:43AM -0500, Serge Hallyn wrote:
>>> Hi,
>>> virsh has save/restore to do a one-time save+shutdown.  But it
>>> does not expose kvm's savevm/restorevm, which let's me do
>>> incremental snapshots.  Is there a specific reason why that
>>> is not exposed in libvirt, or is it just that noone has
>>> implemented it?
>> This is included in the 'snapshot' APIs / virsh commands as of 0.8.1
>> libvirt release
> Oh, excellent!  (Alas, my libvirt 0.8.1  doesn't seem to think that
> my qcow2 images can support snapshots, but I"ll have to look into
> that some more)

You will need to set the driver type <driver name='qemu' type='qcow2'/>


<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='writethrough'/>
<source file='/var/lib/vm/data/images/debian.img'/>
<target dev='vda' bus='virtio'/>


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