Re: [Qemu-devel] [PATCH COLO-Block v5 00/15] Block replication for continuous checkpoints

[Wen Congyang <wency@cn.fujitsu.com>]

On 05/28/2015 12:59 PM, Wen Congyang wrote:
> Ping...

Does anybody have time to review it.

Thanks
Wen Congyang

> 
> On 05/21/2015 12:52 PM, 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-v5
>>
>> The other newest COLO patchse will be sent soon.
>>
>> TODO:
>> 1. Continuous block replication. It will be started after basic functions
>>    are accepted.
>>
>> Changs Log:
>> V5:
>> 1. Address the comments from Gong Lei
>> 2. Speed the failover up. The secondary vm can take over very quickly even
>>    if there are too many I/O requests.
>> 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                    | 272 +++++++++++++++++++++++++++-
>>  block/Makefile.objs        |   3 +-
>>  block/backup.c             |  13 ++
>>  block/nbd.c                |  69 +++++--
>>  block/quorum.c             | 142 ++++++++++++++-
>>  block/replication.c        | 441 +++++++++++++++++++++++++++++++++++++++++++++
>>  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, 1193 insertions(+), 30 deletions(-)
>>  create mode 100644 block/replication.c
>>  create mode 100644 docs/block-replication.txt
>>
> 
> 
> .
>