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Date: Mon, 26 Oct 2009 15:53:49 +0900
From: MORITA Kazutaka <morita.kazutaka@lab.ntt.co.jp>
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Subject: [Qemu-devel] Re: [ANNOUNCE] Sheepdog: Distributed Storage System
	for KVM
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To: Dietmar Maurer <dietmar@proxmox.com>
Cc: "qemu-devel@nongnu.org" <qemu-devel@nongnu.org>, "linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>, Avi Kivity <avi@redhat.com>, "kvm@vger.kernel.org" <kvm@vger.kernel.org>, Javier Guerra <javier@guerrag.com>

On 2009/10/25 17:51, Dietmar Maurer wrote:
>>>> Do you support multiple guests accessing the same image?
>>> A VM image can be attached to any VMs but one VM at a time; multiple
>>> running VMs cannot access to the same VM image.
> 
> I guess this is a problem when you want to do live migrations?
> 
Yes, because Sheepdog locks a VM image when it is opened.
To avoid this problem, locking must be delayed until migration has done.
This is also a TODO item.

--
MORITA Kazutaka