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Date: Mon, 13 Oct 2014 09:06:01 +0200
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Subject: Re: [Qemu-devel] qemu drive-mirror to rbd storage : no sparse rbd
	image
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To: Alexandre DERUMIER <aderumier@odiso.com>
Cc: Ceph Devel <ceph-devel@vger.kernel.org>, qemu-devel <qemu-devel@nongnu.org>

Il 13/10/2014 08:06, Alexandre DERUMIER ha scritto:
> 
> Also, about drive-mirror, I had tried with detect-zeroes with simple qcow2 file, 
> and It don't seem to help.
> I'm not sure that detect-zeroes is implement in drive-mirror.
> 
> also, the target mirrored volume don't seem to have the detect-zeroes option
> 
> 
> # info block
> drive-virtio1: /source.qcow2 (qcow2)
>     Detect zeroes:    on
> 
> #du -sh source.qcow2 : 2M
> 
> drive-mirror  source.qcow2 -> target.qcow2
> 
> # info block
> drive-virtio1: /target.qcow2 (qcow2)
> 
> #du -sh target.qcow2 : 11G
> 

Ah, you're right.  We need to add an options field, or use a new
blockdev-mirror command.

Paolo