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From: Andrey Korolyov <andrey@xdel.ru>
Date: Thu, 21 May 2015 14:43:41 +0300
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Subject: Re: [Qemu-devel] [PATCH COLO v4 01/15] docs: block replication's
	description
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To: Wen Congyang <wency@cn.fujitsu.com>
Cc: Kevin Wolf <kwolf@redhat.com>, Yang Hongyang <yanghy@cn.fujitsu.com>, Fam Zheng <famz@redhat.com>, Wen Congyang <ghostwcy@gmail.com>, qemu block <qemu-block@nongnu.org>, Jiang Yunhong <yunhong.jiang@intel.com>, Dong Eddie <eddie.dong@intel.com>, "Dr. David Alan Gilbert" <dgilbert@redhat.com>, qemu devel <qemu-devel@nongnu.org>, Lai Jiangshan <laijs@cn.fujitsu.com>, Gonglei <arei.gonglei@huawei.com>, Stefan Hajnoczi <stefanha@redhat.com>, Paolo Bonzini <pbonzini@redhat.com>, Max Reitz <mreitz@redhat.com>, zhanghailiang <zhang.zhanghailiang@huawei.com>

On Thu, May 21, 2015 at 11:35 AM, Wen Congyang <wency@cn.fujitsu.com> wrote:
> On 05/21/2015 12:31 AM, Andrey Korolyov wrote:
>> On Thu, May 14, 2015 at 6:38 PM, Dr. David Alan Gilbert
>> <dgilbert@redhat.com> wrote:
>>> * Wen Congyang (ghostwcy@gmail.com) wrote:
>>>> At 2015/5/14 19:19, Dr. David Alan Gilbert Wrote:
>>>>> One thing I wanted to check I understand;  how much RAM do the active and hidden
>>>>> disks use;  lets say during the 1st checkpoint   10MB of disk is written,
>>>>> and during hte 2nd checkpoint a different 10MB of the disk is written
>>>>> (to different locations on the disk); how big are the active and hidden
>>>>> disks in RAM - are they 10MB or 20MB?
>>>>
>>>> 10MB, we will make active and hidden disks empty when doing checkpoint.
>>>
>>> Thanks, that's what I was hoping.
>>>
>>> Dave
>>>
>>>>
>>>> Thanks
>>>> Wen Congyang
>>> --
>>> Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK
>>>
>>
>>
>> Hello Wen, others,
>>
>> are you planning to add raw support for a disk underlying below
>> nbd-server (secondary copy in docs) anytime soon?
>
> What do you want? The primary disk and secondary disk can be any
> format.
>
> Thanks
> Wen Congyang

Oh, sorry, I misread the statement in the readme yesterday, thought
that the second storage must be in qcow2 format. Over yesterday`s late
hours I had picked 'bottom' patches for 3.10 (seqadj introduction and
nfnetlink improvements) and will play with COLO very soon.