[Libvir] Snapshots for Xen and KVM

[Bryan Kearney]

Is there a means of snapshotting before you start up xen, and then 
reverting after you shut it down?

-- bk


Richard W.M. Jones wrote:
> On Tue, Mar 11, 2008 at 12:54:37PM +0200, Gabriel Kaufmann wrote:
>> Does anyone knows if Xen and KVM support snapshots (regardless if
>> Libvirt provides the API for them).
> 
> It's currently on the Xen to-do list, but apart from some research
> papers I'm not aware of them implementing it.  Perhaps recently.
> Checkpointing is tricky to get right because you have to take a
> snapshot of the memory and disk at exactly the same moment.
> 
> Note that neither Xen's live migration nor the domain save features
> are real checkpoints, because they both only consider the memory.
> 
>> If yes, will libvirt add API for it?
> 
> If it's supported, then why not.
> 
> Rich.
>