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

[Hailiang Zhang]

On 2015/12/1 18:40, 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.

Hi Dave,

You can refer to https://github.com/coloft/qemu/tree/colo-v2.2-periodic-mode,
The block replication part in this link is also the newest version.

Congyang has deleted this confused branch, we will pay attention to this later 
in next version.

Thanks,
Hailiang

> > 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
>
>
> .