On Thu, Mar 10, 2011 at 9:32 AM, Jes Sorensen <jes.soren...@redhat.com> wrote: > On 03/10/11 10:27, Stefan Hajnoczi wrote: >> I have CCed Jes who has been working on a live snapshot mechanism. He >> recently added the snapshot_blkdev monitor command that takes a >> snapshot of a block device while the VM is running. A new image file >> is created based off the original image file (which will no longer be >> modified), all new disk writes go to the new image file. It is safe >> to perform read-only access to the original image file. There >> currently is no support to merge the snapshot changes back into the >> original image while the VM is running, but I think that is the next >> planned step. > > Yes, keep in mind that the live snapshot is only for external snapshot > files, it doesn't deal with internal snapshots.
Yep, that's why I'm interested in Saurav's use case. Many use cases work with either internal or external snapshot but it depends on the details. Stefan
