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

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

On 12/02/2015 09:00 AM, Wen Congyang wrote:
> On 12/01/2015 06:40 PM, Dr. David Alan Gilbert wrote:
>> * Wen Congyang (wency@cn.fujitsu.com) 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...

The reason is that: git send-email has a bug:
http://permalink.gmane.org/gmane.comp.version-control.git/274569

Thanks
Wen Congyang

> 
> 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 / dgilbert@redhat.com / Manchester, UK
>>
>>
>> .
>>
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