Re: [Qemu-devel] [Patch v12 00/10] Block replication for continuous checkpoints

[Wen Congyang]

On 12/01/2015 06:40 PM, Dr. David Alan Gilbert wrote:
> * Wen Congyang (address@hidden) wrote:
>> Block replication is a very important feature which is used for
>> continuous checkpoints(for example: COLO).
>>
>> You can get the detailed information about block replication from here:
>> http://wiki.qemu.org/Features/BlockReplication
>>
>> Usage:
>> Please refer to docs/block-replication.txt
>>
>> This patch series is based on the following patch series:
>> 1. http://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg04949.html
>> 2. http://lists.nongnu.org/archive/html/qemu-devel/2015-11/msg06043.html
>>
>> You can get the patch here:
>> https://github.com/coloft/qemu/tree/wency/block-replication-v12
>>
>> You can get the patch with framework here:
>> https://github.com/coloft/qemu/tree/wency/colo_framework_v11.2
> 
> Neither of these links work for me, and I see that  only messages 0..7 in the
> series hit the list.

I forgot to push it to github...
And I also received the messages 0..7, and I don't know what's wrong...

I will push it to github, and resend them.

Thanks
Wen Congyang

> 
> Dave
> 
>>
>> TODO:
>> 1. Continuous block replication. It will be started after basic functions
>>    are accepted.
>>
>> Changs Log:
>> V12:
>> 1. Rebase to the newest codes
>> 2. Use backing reference to replcace 'allow-write-backing-file'
>> V11:
>> 1. Reopen the backing file when starting blcok replication if it is not
>>    opened in R/W mode
>> 2. Unblock BLOCK_OP_TYPE_BACKUP_SOURCE and BLOCK_OP_TYPE_BACKUP_TARGET
>>    when opening backing file
>> 3. Block the top BDS so there is only one block job for the top BDS and
>>    its backing chain.
>> V10:
>> 1. Use blockdev-remove-medium and blockdev-insert-medium to replace backing
>>    reference.
>> 2. Address the comments from Eric Blake
>> V9:
>> 1. Update the error messages
>> 2. Rebase to the newest qemu
>> 3. Split child add/delete support. These patches are sent in another 
>> patchset.
>> V8:
>> 1. Address Alberto Garcia's comments
>> V7:
>> 1. Implement adding/removing quorum child. Remove the option non-connect.
>> 2. Simplify the backing refrence option according to Stefan Hajnoczi's 
>> suggestion
>> V6:
>> 1. Rebase to the newest qemu.
>> 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 (10):
>>   unblock backup operations in backing file
>>   Store parent BDS in BdrvChild
>>   Backup: clear all bitmap when doing block checkpoint
>>   Allow creating backup jobs when opening BDS
>>   docs: block replication's description
>>   Add new block driver interfaces to control block replication
>>   quorum: implement block driver interfaces for block replication
>>   Implement new driver for block replication
>>   support replication driver in blockdev-add
>>   Add a new API to start/stop replication, do checkpoint to all BDSes
>>
>>  block.c                    | 145 ++++++++++++
>>  block/Makefile.objs        |   3 +-
>>  block/backup.c             |  14 ++
>>  block/quorum.c             |  78 +++++++
>>  block/replication.c        | 549 
>> +++++++++++++++++++++++++++++++++++++++++++++
>>  blockjob.c                 |  11 +
>>  docs/block-replication.txt | 227 +++++++++++++++++++
>>  include/block/block.h      |   9 +
>>  include/block/block_int.h  |  15 ++
>>  include/block/blockjob.h   |  12 +
>>  qapi/block-core.json       |  34 ++-
>>  11 files changed, 1093 insertions(+), 4 deletions(-)
>>  create mode 100644 block/replication.c
>>  create mode 100644 docs/block-replication.txt
>>
>> -- 
>> 2.5.0
>>
>>
>>
> --
> Dr. David Alan Gilbert / address@hidden / Manchester, UK
> 
> 
> .
>