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Date: Fri, 24 Apr 2015 11:36:35 +0200
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Subject: Re: [Qemu-devel] [PATCH COLO v3 01/14] docs: block replication's
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To: Wen Congyang <wency@cn.fujitsu.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Fam Zheng <famz@redhat.com>, Lai Jiangshan <laijs@cn.fujitsu.com>, qemu block <qemu-block@nongnu.org>, armbru@redhat.com, jcody@redhat.com, Jiang Yunhong <yunhong.jiang@intel.com>, Dong Eddie <eddie.dong@intel.com>, qemu devel <qemu-devel@nongnu.org>, Max Reitz <mreitz@redhat.com>, Gonglei <arei.gonglei@huawei.com>, Stefan Hajnoczi <stefanha@redhat.com>, Yang Hongyang <yanghy@cn.fujitsu.com>, zhanghailiang <zhang.zhanghailiang@huawei.com>



On 24/04/2015 11:38, Wen Congyang wrote:
>> > 
>> > That can be done with drive-mirror.  But I think it's too early for that.
> Do you mean use drive-mirror instead of quorum?

Only before starting up a new secondary.  Basically you do a migration
with non-shared storage, and then start the secondary in colo mode.

But it's only for the failover case.  Quorum (or a new block/colo.c
driver or filter) is fine for normal colo operation.

Paolo