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


From: Paolo Bonzini
Subject: Re: [Qemu-block] [PATCH COLO v3 01/14] docs: block replication's description
Date: Wed, 29 Apr 2015 10:29:44 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.5.0


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...

Paolo



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