[libvirt] [PATCH] qemu: Do not unlink managedsave image if restoring fails.

[Eric Blake]

On 04/06/2011 07:11 AM, Daniel Berteaud wrote:
>>   The problem there is that you are changing the command behaviour.
>> The user may snapshot the disk separately and use this to implement
>> a simplified domain snapshot. Doing the remove may avoid troubles
>> for those not knowing what they are doing, but also break something
>> for those who know what they are doing.
> 
> I completely agree, virsh restore shouldn't remove the saved state. I
> often use this and restore several time the same dump, because I
> independently save (and restore) the VM disk.

Hmm, I should read the full thread before replying.  Altering a saved
image to mark it as successfully restored would potentially interfere
with this usage pattern (you'd either have to pass --force to the
restore to override the bit, or we'd have to introduce a new command
that can be used to easily remove the bit to be called in tandem with
rewinding disk state back to its earlier point).

I guess what that means for today is that this patch series should focus
just on managedsave behavior, and for save/restore should focus only on
documentation.

-- 
Eric Blake   eblake at redhat.com    +1-801-349-2682
Libvirt virtualization library http://libvirt.org

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