* Hongyang Yang (yan...@cn.fujitsu.com) wrote: > Hi Dave,
> >For the COLO disk replication; are you talking here about 'local storage' > >and treating it as 'internal state' or 'external state' (as described in the > >first half of 4.4 in the original COLO paper)? > > 'local storage' and 'internal state'. This is what later half of 4.4 said: > 'COLO considers the state of local storage device as an internal s- > tate of the guest, and snapshots the local storage state as part of the > VM checkpoint, and plans to explore the other solution in future.' Thanks for the clarification. Dave > > > > >I know some groups would like to take advantage of facilities in the storage > >layer to help; e.g. take snapshots/rollback etc - so I think it's best > >to do (1) but make the interface clean so that other mechanisms could be > >added. > >Similarly I guess things like scsi-xcopy might help for some people - I'm > >not saying implement these, just if possible make an interface where it could > >fit later. > > > >It's probably best to check with the QEMU storage guys that you can reuse > >anything they have; there was a discussion a few weeks back where I cc'd > >Fam, Stefan and Kevin in). > > > >Dave > > > >-- > >Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK > >. > > > > -- > Thanks, > Yang. -- Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
