From mboxrd@z Thu Jan 1 00:00:00 1970 From: MORITA Kazutaka Subject: Re: [ANNOUNCE] Sheepdog: Distributed Storage System for KVM Date: Mon, 26 Oct 2009 15:53:49 +0900 Message-ID: <4AE5477D.30007@lab.ntt.co.jp> References: <4ADE988B.2070303@lab.ntt.co.jp> <4AE07A7F.8000002@redhat.com> <8fd1d76d0910230341w7978ac09te203ef34b79a86c6@mail.gmail.com> <90eb1dc70910230714h65e918a4n255bcf97634b26b0@mail.gmail.com> <90D306BE6EBC8D428A824FBBA7A3113D012F07D53C@ronja.maurer-it.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: Javier Guerra , Avi Kivity , "kvm@vger.kernel.org" , "qemu-devel@nongnu.org" , "linux-fsdevel@vger.kernel.org" To: Dietmar Maurer Return-path: Received: from tama500.ecl.ntt.co.jp ([129.60.39.148]:60947 "EHLO tama500.ecl.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754583AbZJZGyF (ORCPT ); Mon, 26 Oct 2009 02:54:05 -0400 In-Reply-To: <90D306BE6EBC8D428A824FBBA7A3113D012F07D53C@ronja.maurer-it.com> Sender: linux-fsdevel-owner@vger.kernel.org List-ID: 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