From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:56242) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YqeKm-00021p-63 for qemu-devel@nongnu.org; Fri, 08 May 2015 05:12:41 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YqeKi-0004TV-8H for qemu-devel@nongnu.org; Fri, 08 May 2015 05:12:40 -0400 From: Wen Congyang Date: Fri, 8 May 2015 17:15:52 +0800 Message-ID: <1431076567-30371-1-git-send-email-wency@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Subject: [Qemu-devel] [PATCH COLO v4 00/15] Block replication for continuous checkpoints List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu devel , Fam Zheng , Max Reitz , Paolo Bonzini Cc: Kevin Wolf , qemu block , Lai Jiangshan , Jiang Yunhong , Dong Eddie , "Dr. David Alan Gilbert" , Stefan Hajnoczi , Yang Hongyang Block replication is a very important feature which is used for continuous checkpoints(for example: COLO). Usage: Please refer to docs/block-replication.txt You can get the patch here: https://github.com/wencongyang/qemu-colo/commits/block-replication-v4 You can get the patch with the other COLO patches here: https://github.com/wencongyang/qemu-colo/tree/colo_huawei_v4.7 TODO: 1. Test failover when the guest does too many I/O operations. If it takes too much time, we need to optimize it. 2. Continuous block replication. It will be started after basic functions are accepted. Changs Log: V4: 1. Introduce a new driver replication to avoid touch nbd and qcow2. V3: 1: use error_setg() instead of error_set() 2. Add a new block job API 3. Active disk, hidden disk and nbd target uses the same AioContext 4. Add a testcase to test new hbitmap API V2: 1. Redesign the secondary qemu(use image-fleecing) 2. Use Error objects to return error message 3. Address the comments from Max Reitz and Eric Blake Wen Congyang (15): docs: block replication's description allow writing to the backing file Allow creating backup jobs when opening BDS block: Parse "backing_reference" option to reference existing BDS Backup: clear all bitmap when doing block checkpoint Don't allow a disk use backing reference target Add new block driver interface to connect/disconnect the remote target NBD client: implement block driver interfaces to connect/disconnect NBD server Introduce a new -drive option to control whether to connect to remote target NBD client: connect to nbd server later Add new block driver interfaces to control block replication skip nbd_target when starting block replication quorum: implement block driver interfaces for block replication quorum: allow ignoring child errors Implement new driver for block replication block.c | 270 +++++++++++++++++++++++- block/Makefile.objs | 3 +- block/backup.c | 13 ++ block/nbd.c | 67 ++++-- block/quorum.c | 142 ++++++++++++- block/replication.c | 512 +++++++++++++++++++++++++++++++++++++++++++++ blockdev.c | 8 + blockjob.c | 10 + docs/block-replication.txt | 179 ++++++++++++++++ include/block/block.h | 10 + include/block/block_int.h | 18 ++ include/block/blockjob.h | 12 ++ qapi/block.json | 16 ++ qemu-options.hx | 4 + tests/qemu-iotests/051 | 13 ++ tests/qemu-iotests/051.out | 13 ++ 16 files changed, 1260 insertions(+), 30 deletions(-) create mode 100644 block/replication.c create mode 100644 docs/block-replication.txt -- 2.1.0