On Tue, Jun 14, 2011 at 6:55 PM, Simon Tian <aixt2006@xxxxxxxxx> wrote: > > Hmm, is vm need to be shutdown too when setting a snapshot, because of > the IO state > ( like file description. etc ) in the vm memory. Setting the snapshot is a runtime operation. Either you load it originally with that snapshot, or you reset the vm state, in which case you also set the snapshot. In both case there's no need to reset the vm. > > For the snapshot rollback, a LAZYLOAD feature should be attractive: > rollback is instant > then vm could be boot soon with out waiting for going through the > object, which may be > a very long time. The objects needed at present were gone through at > present, the rbd client > go through other objects during the vm running. The disadvantage is > that rbd client may need > to query if LAZYLOAD is finished when creating a new snapshot? > snapshot As I said earlier, on our roadmap we have rbd layering planned which will give a solution to rollback. Yehuda -- To unsubscribe from this list: send the line "unsubscribe ceph-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
