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Re: [Qemu-devel] [Patch v12 00/10] Block replication for continuous chec
From: |
Dr. David Alan Gilbert |
Subject: |
Re: [Qemu-devel] [Patch v12 00/10] Block replication for continuous checkpoints |
Date: |
Tue, 1 Dec 2015 10:40:41 +0000 |
User-agent: |
Mutt/1.5.24 (2015-08-30) |
* 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.
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
- Re: [Qemu-devel] [Patch v12 00/10] Block replication for continuous checkpoints,
Dr. David Alan Gilbert <=