[libvirt] QEMU migration with non-shared storage

[Guido Günther]

On Thu, Sep 11, 2014 at 02:45:41PM +1000, Blair Bethwaite wrote:
> Hi Michael!
> 
> On 11 September 2014 14:13, Michael Chapman <mike at very.puzzling.org> wrote:
> > Why is RBD is handled specially in this function? The current logic is that
> > an RBD-backed disk is safe to be migrated even if it's got caching enabled,
> > but I'm not sure how RBD is different from other backends in this regard.
> 
> I recall this has was discussed before but am having trouble finding
> the thread. I think the gist of it was that the rbd integration was
> just lucky, but it wasn't using the appropriate interfaces defined by
> libvirt for flushing.
> 
> And I think Debian patches away the qemuMigrationIsSafe pass for RBD,
> so it'll only pass for cache=none.

Debian doesn't ship such a patch.
Cheers,
 -- Guido