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


From: Fam Zheng
Subject: Re: [Qemu-devel] [PATCH COLO v3 01/14] docs: block replication's description
Date: Fri, 24 Apr 2015 10:01:49 +0800
User-agent: Mutt/1.5.23 (2014-03-12)

On Thu, 04/23 14:23, Paolo Bonzini wrote:
> 
> 
> On 23/04/2015 14:19, Dr. David Alan Gilbert wrote:
> >> > So that means the bdrv_start_replication and bdrv_stop_replication
> >> > callbacks are more or less redundant, at least on the primary?
> >> > 
> >> > In fact, who calls them?  Certainly nothing in this patch set...
> >> > :)
> > In the main colo set (I'm looking at the February version) there
> > are calls to them, the 'stop_replication' is called at failover time.
> > 
> > Here is I think the later version:
> > http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg05391.html
> 
> I think the primary shouldn't do any I/O after failover (and the
> secondary should close the NBD server) so it is probably okay to ignore
> the removal for now.  Inserting the filter dynamically is probably
> needed though.

Or maybe just enabling/disabling?

Fam



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