On 07/02/2015 03:37 AM, Michael R. Hines wrote: > On 06/30/2015 11:11 PM, Wen Congyang wrote: >> On 07/01/2015 11:09 AM, Michael R. Hines wrote: >>> On 03/25/2015 04:36 AM, Wen Congyang wrote: >>>> 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-v2 >>>> >>>> Changs Log: >>>> 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 (13): >>>> docs: block replication's description >>>> quorum: allow ignoring child errors >>>> NBD client: connect to nbd server later >>>> Add new block driver interfaces to control block replication >>>> quorum: implement block driver interfaces for block replication >>>> NBD client: implement block driver interfaces for block replication >>>> 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 >>>> qcow2: support colo >>>> skip nbd_target when starting block replication >>>> Don't allow a disk use backing reference target >>>> >>>> block.c | 242 +++++++++++++++++++++++- >>>> block/Makefile.objs | 2 +- >>>> block/backup.c | 12 ++ >>>> block/nbd.c | 171 +++++++++++++++-- >>>> block/qcow2.c | 447 >>>> ++++++++++++++++++++++++++++++++++++++++++++- >>>> block/qcow2.h | 6 + >>>> block/quorum.c | 143 ++++++++++++++- >>>> docs/block-replication.txt | 147 +++++++++++++++ >>>> include/block/block.h | 5 + >>>> include/block/block_int.h | 13 ++ >>>> include/qemu/hbitmap.h | 8 + >>>> qapi/block.json | 16 ++ >>>> tests/qemu-iotests/051 | 13 ++ >>>> tests/qemu-iotests/051.out | 13 ++ >>>> util/hbitmap.c | 19 ++ >>>> 15 files changed, 1230 insertions(+), 27 deletions(-) >>>> create mode 100644 docs/block-replication.txt >>>> >>> When I try this patch with the MicroCheckpointing codebase, I'm having >>> trouble starting up the secondary/backup VM >>> using the branch "block-replication-v7" >>> >>> $ qemu-system-x86_64 -drive if=none,driver=raw,file=file.raw,id=nbd_target1 >>> -drive >>> if=virtio,driver=replication,mode=secondary,export=foo,file.file.filename=active_disk.qcow2,file.driver=qcow2,file.backing_reference.drive_id=nbd_target1,file.backing_reference.hidden-disk.file.filename=hidden_disk.qcow2,file.backing_reference.hidden-disk.driver=qcow2,file.backing_reference.hidden-disk.allow-write-backing-file=on >>> >>> Block format 'qcow2' used by device '' doesn't support the option >>> 'backing_reference.hidden-disk.allow-write-backing-file' >>> >>> What am I doing wrong here? >> The command is wrong. If you use the branch block-replication-v7, the >> command line should like: >> -drive >> if=none,driver=raw,file=/data/images/kvm/suse/suse11_3.img,id=colo1,cache=none,aio=native >> -drive >> if=virtio,driver=replication,mode=secondary,throttling.bps-total-max=70000000,file.file.filename=/mnt/ramfs/active_disk.img,file.driver=qcow2,file.backing.file.filename=/mnt/ramfs/hidden_disk.img,file.backing.driver=qcow2,file.backing.allow-write-backing-file=on,file.backing.backing.backing_reference=colo1 >> >> Thanks >> Wen Congyang >> >>> - Michael >>> >>> . >>> >> > > Also, this command line you sent doesn't have the export option, but your > wiki does. What's the difference?
You can get the codes from here: https://github.com/coloft/qemu/tree/wency/colo_huawei_v7.2 And I have updated the wiki. Please setup your environment according to the wiki. Thanks Wen Congyang > > - Michael > > . >
