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Even though it's more of a libvirt question since the topic of snapshot is being discussed, thought of asking it. Does libvirt 0.95 uses the backing file concept? or is that the same thing that Vish mentioned as option 1

Ranga

On Mar 9, 2012, at 10:06 AM, "Daniel P. Berrange" <berrange at redhat.com> wrote:

> On Fri, Mar 09, 2012 at 03:57:30PM +0100, Soren Hansen wrote:
>> 2012/3/9 Vishvananda Ishaya <vishvananda at gmail.com>:
>>> OPTION B --> libvirt 9.5 snapshots
>>> 
>>> This method uses the newer snapshot xml in libvirt 9.5 to snapshot only the
>>> root disk.
>>> 
>>> Pros:
>>> plays nicely with libvirt, so the vm is only paused for the minimum amount
>>> of time
>>> Cons:
>>> requires libvirt 9.5, which doesn't exist in oneiric
>> 
>> Oneiric is old hat. I'm cool with 0.9.5. If someone wants to spend
>> time building an inferior (i.e. that requires more downtime during
>> snapshotting) implementation that works with older versions of
>> libvirt, that's fine, but as a project, my view is: There's excellent
>> free software available that enables us to build cooler things faster.
>> We should use it.
>> 
>> Besides, libvirt 0.9.5 has been out for over 6 months. It's not *that* new.
> 
> And it possible for people to build any new libvirt release for
> any old Ubuntu release they desire to support. So if someone really
> wants to use new OpenStack on older distros they aren't locked out.
> 
> Regards,
> Daniel
> -- 
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