On 02/18/11 15:57, Anthony Liguori wrote: > On 02/18/2011 08:30 AM, Jes Sorensen wrote: >> However if there's an agent connection, it could be arranged in a way >> allowing the host to reconnect to the guest agent. In that way it really >> shouldn't be a big deal as long as our agent commands aren't too complex. > > Oh, but they'll be nice and complex :-) What happens if you do a live > migration in the middle of doing a live backup? You'll end up with the > guest waiting to be told that it's okay to unfreeze itself only to never > be told.
Well that isn't really different from the current setup - if QEMU migrates, the admin tool has to connect to the new QEMU process and issue the fsthaw command there instead. > Terminating in QEMU means we can do intelligent things like delay live > migration convergence, save state, etc. We could easily add a flag for this in QEMU itself, so I don't see it being a big issue. Jes
