Re: [Qemu-devel] [PATCH COLO v3 01/14] docs: block replication's description

[Gonglei]

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.

Regards,
-Gonglei