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Date: Fri, 24 Apr 2015 11:04:14 +0200
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Subject: Re: [Qemu-devel] [PATCH COLO v3 01/14] docs: block replication's
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To: "Dr. David Alan Gilbert" <dgilbert@redhat.com>, Wen Congyang <wency@cn.fujitsu.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 10:58, Dr. David Alan Gilbert wrote:
>> > If we can add a filter dynamically, we can add a filter that's file is nbd
>> > dynamically after secondary qemu's nbd server is ready. In this case, I think
>> > there is no need to touch nbd client.
> Yes, I think maybe the harder part is getting a copy of the current disk
> contents to the new secondary while the new primary is still running.

That can be done with drive-mirror.  But I think it's too early for that.

Paolo