From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Zhang Haoyu" Subject: [question] incremental backup a running vm Date: Wed, 21 Jan 2015 18:32:34 +0800 Message-ID: <201501211832330964659@sangfor.com.cn> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: "Paolo Bonzini" , "Stefan Hajnoczi" , "Fam Zheng" To: "qemu-devel" , "kvm" Return-path: Received: from smtp.sangfor.com.cn ([58.251.49.30]:40896 "EHLO mail.sangfor.com.cn" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751145AbbAUKcl (ORCPT ); Wed, 21 Jan 2015 05:32:41 -0500 Sender: kvm-owner@vger.kernel.org List-ID: Hi, Does drive_mirror support incremental backup a running vm? Or other mechanism does? incremental backup a running vm requirements: First time backup, all of the allocated data will be mirrored to destination, then a copied bitmap will be saved to a file, then the bitmap file will log dirty for the changed data. Next time backup, only the dirty data will be mirrored to destination. Even the VM shutdown and start after several days, the bitmap will be loaded while starting vm. Any ideas? Thanks, Zhang Haoyu From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:33375) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YDsan-00086Q-Qo for qemu-devel@nongnu.org; Wed, 21 Jan 2015 05:32:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YDsaj-0004hl-R8 for qemu-devel@nongnu.org; Wed, 21 Jan 2015 05:32:57 -0500 Received: from smtp.sangfor.com.cn ([58.251.49.30]:54389 helo=mail.sangfor.com.cn) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YDsaj-0004gz-4x for qemu-devel@nongnu.org; Wed, 21 Jan 2015 05:32:53 -0500 Date: Wed, 21 Jan 2015 18:32:34 +0800 From: "Zhang Haoyu" Message-ID: <201501211832330964659@sangfor.com.cn> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Subject: [Qemu-devel] [question] incremental backup a running vm List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel , kvm Cc: Paolo Bonzini , Fam Zheng , Stefan Hajnoczi Hi, Does drive_mirror support incremental backup a running vm? Or other mechanism does? incremental backup a running vm requirements: First time backup, all of the allocated data will be mirrored to destination, then a copied bitmap will be saved to a file, then the bitmap file will log dirty for the changed data. Next time backup, only the dirty data will be mirrored to destination. Even the VM shutdown and start after several days, the bitmap will be loaded while starting vm. Any ideas? Thanks, Zhang Haoyu