* Wen Congyang (we...@cn.fujitsu.com) 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-v7
>
> You can get ths patch with framework here:
> https://github.com/wencongyang/qemu-colo/commits/colo_framework_v7.2
Hi,
I seem to be having problems with the new listed syntax on the wiki;
on the secondary I'm getting the error
Block format 'replication' used by device 'virtio0' doesn't support the option
'export'
./try/bin/qemu-system-x86_64 -enable-kvm -nographic \
-boot c -m 4096 -smp 4 -S \
-name debug-threads=on -trace events=trace-file \
-netdev tap,id=hn0,script=$PWD/ifup-slave,\
downscript=no,colo_script=$PWD/qemu/scripts/colo-proxy-script.sh,colo_nicname=em4
\
-device e1000,mac=9c:da:4d:1c:b5:89,id=net-pci0,netdev=hn0 \
-device virtio-rng-pci \
-drive
if=none,driver=raw,file=/home/localvms/bugzilla.raw,id=colo1,cache=none,aio=native
\
-drive
if=virtio,driver=replication,mode=secondary,export=colo1,throttling.bps-total-max=70000000,\
file.file.filename=$TMPDISKS/colo-active-disk.qcow2,\
file.driver=qcow2,\
file.backing.file.filename=$TMPDISKS/colo-hidden-disk.qcow2,\
file.backing.driver=qcow2,\
file.backing.backing.backing_reference=colo1,\
file.backing.allow-write-backing-file=on \
-incoming tcp:0:8888
This is using 6fd6ce32 from the colo_framework_v7.2 tag.
What have I missed?
Dave
P.S. the name 'file.backing.backing.backing_reference' is not nice!
>
> TODO:
> 1. Continuous block replication. It will be started after basic functions
> are accepted.
>
> Changs Log:
> 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 (17):
> Add new block driver interface to add/delete a BDS's child
> quorum: implement block driver interfaces add/delete a BDS's child
> hmp: add monitor command to add/remove a child
> introduce a new API qemu_opts_absorb_qdict_by_index()
> quorum: allow ignoring child errors
> introduce a new API to enable/disable attach device model
> introduce a new API to check if blk is attached
> block: make bdrv_put_ref_bh_schedule() as a public API
> Backup: clear all bitmap when doing block checkpoint
> allow writing to the backing file
> Allow creating backup jobs when opening BDS
> block: Allow references for backing files
> docs: block replication's description
> Add new block driver interfaces to control block replication
> skip nbd_target when starting block replication
> quorum: implement block driver interfaces for block replication
> Implement new driver for block replication
>
> block.c | 198 +++++++++++++++++-
> block/Makefile.objs | 3 +-
> block/backup.c | 13 ++
> block/block-backend.c | 33 +++
> block/quorum.c | 244 ++++++++++++++++++++++-
> block/replication.c | 443
> +++++++++++++++++++++++++++++++++++++++++
> blockdev.c | 90 ++++++---
> blockjob.c | 10 +
> docs/block-replication.txt | 179 +++++++++++++++++
> hmp-commands.hx | 28 +++
> include/block/block.h | 11 +
> include/block/block_int.h | 19 ++
> include/block/blockjob.h | 12 ++
> include/qemu/option.h | 2 +
> include/sysemu/block-backend.h | 3 +
> include/sysemu/blockdev.h | 2 +
> qapi/block.json | 16 ++
> util/qemu-option.c | 44 ++++
> 18 files changed, 1303 insertions(+), 47 deletions(-)
> create mode 100644 block/replication.c
> create mode 100644 docs/block-replication.txt
>
> --
> 2.4.3
>
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
