The work-around for this is to SSH into the guest first, put the
database
into backup mode(maybe run sync a time or two to flush out as much from RAM
as possible), take the snap shot, ssh back in to resume the database, backup
the snap, delete the snap.
The main problem in oVirt with this strategy would be the lack of live
snapshot deletion.
Having to shut down the VM to delete/merge a snapshot is not nice :(