From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mailman by lists.gnu.org with tmda-scanned (Exim 4.43) id 1L2Q9N-0005OJ-2I for qemu-devel@nongnu.org; Tue, 18 Nov 2008 07:57:49 -0500 Received: from exim by lists.gnu.org with spam-scanned (Exim 4.43) id 1L2Q9L-0005NO-8c for qemu-devel@nongnu.org; Tue, 18 Nov 2008 07:57:48 -0500 Received: from [199.232.76.173] (port=47562 helo=monty-python.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1L2Q9K-0005NK-W9 for qemu-devel@nongnu.org; Tue, 18 Nov 2008 07:57:47 -0500 Received: from mail.codesourcery.com ([65.74.133.4]:57579) by monty-python.gnu.org with esmtps (TLS-1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.60) (envelope-from ) id 1L2Q9K-0006sT-Ly for qemu-devel@nongnu.org; Tue, 18 Nov 2008 07:57:46 -0500 From: Paul Brook Subject: Re: [Qemu-devel] [PATCH] add file: migration support (r2) Date: Tue, 18 Nov 2008 12:57:41 +0000 References: <20081118030437.GA940@shareable.org> In-Reply-To: <20081118030437.GA940@shareable.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <200811181257.42351.paul@codesourcery.com> Reply-To: qemu-devel@nongnu.org List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Charles Duffy On Tuesday 18 November 2008, Jamie Lokier wrote: > Paul Brook wrote: > > > I'm not sure if "live" migration to a file is really useful. "Dead" > > > migration is useful for suspending a VM to disk. > > > > Right. That's the point I was trying to make. > > I thought of a use for live migration to and from a file. It's when > you have to restart a host while minimising downtime of all its > guests. The liveness reduces that downtime. I wouldn't be surprised if this actually took longer, because you have to read more data in when you do the restore. Paul