From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:50689) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S4cHV-0003cx-Ls for qemu-devel@nongnu.org; Mon, 05 Mar 2012 13:05:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S4cHT-0001IY-W4 for qemu-devel@nongnu.org; Mon, 05 Mar 2012 13:05:09 -0500 Received: from mail-ey0-f173.google.com ([209.85.215.173]:38168) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S4cHT-0001H7-NE for qemu-devel@nongnu.org; Mon, 05 Mar 2012 13:05:07 -0500 Received: by eaaf11 with SMTP id f11so875992eaa.4 for ; Mon, 05 Mar 2012 10:05:05 -0800 (PST) Sender: Paolo Bonzini Message-ID: <4F55004F.4030506@redhat.com> Date: Mon, 05 Mar 2012 19:05:03 +0100 From: Paolo Bonzini MIME-Version: 1.0 References: <1329930815-7995-1-git-send-email-fsimonce@redhat.com> <20120305165902.GC10338@amt.cnet> <4F54F5E4.4050206@redhat.com> <20120305174431.GA14659@amt.cnet> In-Reply-To: <20120305174431.GA14659@amt.cnet> Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Live Block Migration using Mirroring List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Marcelo Tosatti Cc: kwolf@redhat.com, Federico Simoncelli , Eric Blake , qemu-devel@nongnu.org Il 05/03/2012 18:44, Marcelo Tosatti ha scritto: > OK, can't it be fixed by image streaming on top of a blkmirror device? > This would avoid a duplicate interface (such as no need to snapshot_blkdev > to change to final copy). > > That is, start image streaming to a blkmirror device so that updates to > the new snapshot are replicated across target and destination domains. This works too, but if you don't have a base image, streaming will "complete" both the source and destination images with zero clusters. It's just a limitation of the current implementation, of course. Paolo