From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42171) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X4OYJ-0004Fc-4o for qemu-devel@nongnu.org; Tue, 08 Jul 2014 02:07:04 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1X4OY9-0002Vj-6A for qemu-devel@nongnu.org; Tue, 08 Jul 2014 02:06:54 -0400 Received: from e9.ny.us.ibm.com ([32.97.182.139]:38928) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1X4OY9-0002TA-0I for qemu-devel@nongnu.org; Tue, 08 Jul 2014 02:06:45 -0400 Received: from /spool/local by e9.ny.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 8 Jul 2014 02:06:22 -0400 Received: from b01cxnp22033.gho.pok.ibm.com (b01cxnp22033.gho.pok.ibm.com [9.57.198.23]) by d01dlp01.pok.ibm.com (Postfix) with ESMTP id C8D1538C8046 for ; Tue, 8 Jul 2014 02:06:19 -0400 (EDT) Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by b01cxnp22033.gho.pok.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id s6866J9t5505524 for ; Tue, 8 Jul 2014 06:06:19 GMT Received: from d01av04.pok.ibm.com (localhost [127.0.0.1]) by d01av04.pok.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id s6866JP0002803 for ; Tue, 8 Jul 2014 02:06:19 -0400 Message-ID: <53BB8A56.2050005@linux.vnet.ibm.com> Date: Tue, 08 Jul 2014 14:06:14 +0800 From: "Michael R. Hines" MIME-Version: 1.0 References: <53A8DD80.7070905@cn.fujitsu.com> <20140701121248.GH2394@work-vm> <53B4D133.4060903@cn.fujitsu.com> In-Reply-To: <53B4D133.4060903@cn.fujitsu.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [RFC] COLO HA Project proposal List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Hongyang Yang , "Dr. David Alan Gilbert" Cc: FNST-Gui Jianfeng , Dong Eddie , qemu-devel@nongnu.org, kvm@vger.kernel.org On 07/03/2014 11:42 AM, Hongyang Yang wrote: > >> I wonder if there is anyway to coordinate this between COLO, Michael >> Hines microcheckpointing and the two separate reverse-execution >> projects that also need to do some similar things. >> Are there any standard APIs for the heartbeet thing we can already >> tie into? > > Sadly we have checked MC, it does not have heartbeat support for now. > Right, MC by itself does not need heartbeats out-of-the box. Probably the best thing we can coordinate from MC is the part of the data transmission protocol and memory management - because we need to make sure you guys are staying compatible with the QEMUFile abstraction the same way that the TCP and RDMA protocols are staying compatible with that abstraction. COLO should able to run over any protocol supported by QEMUFile. I can help with some of that... - Michael