On 2015-03-10 10:58:44, Fam Zheng wrote: > > Is it worthy to implement it? > > Maybe, I think once we start to assign node-name to each BDS in the tree, this > will be natural to implement. > Once implemented, to be honest, I really don't see much advantages of incremental backup over aforementioned mechanism(external snapshot + active block commit), especially, regarding the case of source vm non-normal shutdown, full copy is needed, and corresponding check mechanism is needed too. I think so much exceptional scenarios are needed to be considered for incremental backup mechanism. Maybe I missed something.
Thanks, Zhang Haoyu > > And does qemu support commit any external snapshot to its backing file? > > Yes.
