From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50538) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XRyn4-0008CY-Ui for qemu-devel@nongnu.org; Thu, 11 Sep 2014 03:27:45 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1XRymy-00060g-Pw for qemu-devel@nongnu.org; Thu, 11 Sep 2014 03:27:38 -0400 Received: from mx1.redhat.com ([209.132.183.28]:54911) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1XRymy-00060c-JB for qemu-devel@nongnu.org; Thu, 11 Sep 2014 03:27:32 -0400 Message-ID: <54114EDB.7050509@redhat.com> Date: Thu, 11 Sep 2014 09:27:23 +0200 From: Paolo Bonzini MIME-Version: 1.0 References: <53D8FF52.9000104@gmail.com> <1406820870.2680.3.camel@usa> <53DBE726.4050102@gmail.com> <1406947532.2680.11.camel@usa> <53E0AA60.9030404@gmail.com> <1407376929.21497.2.camel@usa> <53E60F34.1070607@gmail.com> <1407587152.24027.5.camel@usa> <53E8FBBD.7050703@gmail.com> <53E92470.60806@linux.vnet.ibm.com> <53F07B73.60407@redhat.com> <54107187.8040706@gmail.com> In-Reply-To: <54107187.8040706@gmail.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] Microcheckpointing: Memory-VCPU / Disk State consistency List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Walid Nouri , "Michael R. Hines" , qemu-devel@nongnu.org, michael@hinespot.com Il 10/09/2014 17:43, Walid Nouri ha scritto: > The drive-mirror (and live migration) does not rely on shared storage > and allow live block device copy and incremental syncing. I think your analysis is right. However, just for completeness I'll note that quorum doesn't need shared storage. To do drive-mirror without shared storage, what you do is run an NBD server on the destination and point mirroring on the source to the NBD server. Similarly, an NBD server on the secondary machine would let quorum do remote replication without shared storage. Paolo