On Wed, Apr 29, 2015 at 04:37:49PM +0800, Gonglei wrote: > On 2015/4/29 16:29, Paolo Bonzini wrote: > > > > > > On 27/04/2015 11:37, Stefan Hajnoczi wrote: > >>>> But it's only for the failover case. Quorum (or a new > >>>> block/colo.c driver or filter) is fine for normal colo > >>>> operation. > >> Perhaps this patch series should mirror the Secondary's disk to a > >> Backup Secondary so that the system can be protected very quickly > >> after failover. > >> > >> I think anyone serious about fault tolerance would deploy a Backup > >> Secondary, otherwise the system cannot survive two failures > >> unless a human administrator is lucky/fast enough to set up a new > >> Secondary. > > > > Let's do one thing at a time. Otherwise nothing of this is going to > > be ever completed... > > > Yes, and the continuous backup feature is on our TODO list. We hope > this series (including basic functions and COLO framework) can be > upstream first.
That's fine, I just wanted to make sure you have the issue in mind. Stefan
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