Ping...
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
>
