From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jes Sorensen Subject: Re: Livebackup feature for qemu/qemu-kvm Date: Mon, 02 May 2011 16:36:05 +0200 Message-ID: <4DBEC155.6010307@redhat.com> References: <4DBDDD67.5010208@sundar.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: "kvm@vger.kernel.org" , Anthony Liguori , Badari Pulavarty , Stefan Hajnoczi To: Jagane Sundar Return-path: Received: from mx1.redhat.com ([209.132.183.28]:7248 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756136Ab1EBOhM (ORCPT ); Mon, 2 May 2011 10:37:12 -0400 In-Reply-To: <4DBDDD67.5010208@sundar.org> Sender: kvm-owner@vger.kernel.org List-ID: On 05/02/11 00:23, Jagane Sundar wrote: > Having a live backup feature for kvm will make it a better solution for > IaaS clouds compared to xen. I would like to solicit feedback from all > of you folks involved in the block subsystem of qemu. Stefan mentioned > that Jes is the person most intimately involved in the block subsystem, > so Jes - your feedback is particularly important. Jagane, Reading your page, the first thing I stumble upon under 'Use Cases' is the reference to EBS storage. What is that? Under details, I think it is not a good idea to rely on QEMU looking for any files with specific file name suffixes. It really should be specified on the command line by the user or admin tool. Other questions, how do you plan to handle crashes or loss of network connection in the middle of a livebackup? How about handling corrupted livebackup files? In general it looks interesting, you could consider submitting a presentation about Livebackup to the KVM Forum 2011. Cheers, Jes