Re: [Qemu-devel] [PATCH v2] make windows notice media change

[Filip Navara]

On Wed, Jul 29, 2009 at 9:11 PM, Paul Brook<address@hidden> wrote:
>> Why shouldn't we support loading version 2 snapshots? Afterall that's
>> why we had the versioning in the first place.
>
> No it's not. Versioning was introduced to *prevent* loading old snapshots and
> crashing or ending up with inconsistent guest state. I'm still unconvinced
> that anything other than very short term backward compatibility is worthwhile
> or even viable.

I see it as a way to migrate a running guest to newer QEMU version, possibly
even with live migration. In fact I used it quite often back in the day when
snapshots were not part of qcow2 yet and when kqemu was still in its heydays.

Best regards,
Filip Navara