Il 28/02/2012 18:46, Federico Simoncelli ha scritto: > > > Thank you for getting this. Being able to have a bogus backing file > > > was a bonus but it's not really required for the mirrored live block > > > migration. We can add the support for switching the backing file in the > > > drive-reopen part. > > > > Wait, it's not really required for oVirt because it creates the > > snapshot outside QEMU. What about everyone else? > > They'll have (as oVirt) two mirrored snapshot pointing at the same > base. The only difference is that the image is created internally, but > that's not hard.
Can you detail how you are switching the backing file in the drive-reopen? Either the BlockDriverState opened by blkmirror, or the one opened at the end, will have to use the "wrong" backing_file. How do you arrange for that? Paolo