It seems i missed someone in CC list, add them.
Thanks
-Xie
On 01/13/2016 05:18 PM, Changlong Xie 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/2015-12/msg04570.html
You can get the patch here:
https://github.com/Pating/qemu/tree/changlox/block-replication-v14
You can get the patch with framework here:
https://github.com/Pating/qemu/tree/changlox/colo_framework_v13
TODO:
1. Continuous block replication. It will be started after basic functions
are accepted.
Changs Log:
V14:
1. Implement auto complete active commit
2. Implement active commit block job for replication.c
3. Address the comments from Stefan, add replication-specific API and data
structure, also remove old block layer APIs
V13:
1. Rebase to the newest codes
2. Remove redundant marcos and semicolon in replication.c
3. Fix typos in block-replication.txt
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 (8):
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
auto complete active commit
Implement new driver for block replication
support replication driver in blockdev-add
block.c | 19 ++
block/Makefile.objs | 3 +-
block/backup.c | 14 +
block/mirror.c | 13 +-
block/replication-comm.c | 66 +++++
block/replication.c | 590 +++++++++++++++++++++++++++++++++++++++
blockdev.c | 2 +-
blockjob.c | 11 +
docs/block-replication.txt | 229 +++++++++++++++
include/block/block_int.h | 4 +-
include/block/blockjob.h | 12 +
include/block/replication-comm.h | 50 ++++
qapi/block-core.json | 33 ++-
qemu-img.c | 2 +-
14 files changed, 1038 insertions(+), 10 deletions(-)
create mode 100644 block/replication-comm.c
create mode 100644 block/replication.c
create mode 100644 docs/block-replication.txt
create mode 100644 include/block/replication-comm.h
.