On 2015/5/21 19:30, Dr. David Alan Gilbert wrote:
* zhanghailiang (zhang.zhanghaili...@huawei.com) wrote:
This is the 5th version of COLO, here is only COLO frame part, include: VM
checkpoint,
failover, proxy API, block replication API, not include block replication.
The block part has been sent by wencongyang:
"[Qemu-devel] [PATCH COLO-Block v5 00/15] Block replication for continuous
checkpoints"
we have finished some new features and optimization on COLO (As a development
branch in github),
but for easy of review, it is better to keep it simple now, so we will not add
too much new
codes into this frame patch set before it been totally reviewed.
You can get the latest integrated qemu colo patches from github (Include Block
part):
https://github.com/coloft/qemu/commits/colo-v1.2-basic
https://github.com/coloft/qemu/commits/colo-v1.2-developing (more features)
Please NOTE the difference between these two branch.
colo-v1.2-basic is exactly same with this patch series, which has basic
features of COLO.
Compared with colo-v1.2-basic, colo-v1.2-developing has some optimization in the
process of checkpoint, including:
1) separate ram and device save/load process to reduce size of extra memory
used during checkpoint
2) live migrate part of dirty pages to slave during sleep time.
Besides, we add some statistic info in colo-v1.2-developing, which you can get
these stat
info by using command 'info migrate'.
You can test any branch of the above,
about how to test COLO, Please reference to the follow link.
http://wiki.qemu.org/Features/COLO.
Thanks, I'll try these out over the next few days.
It would be good to use some tags on the colo-proxy git;
it would be a bit confusing for people trying to use your previous
qemu patches if they fetched todays colo-proxy tree.
Hi Dave,
I have put tags on the colo-proxy in github, thanks for your suggestion.
And one more thing, to test this new version, you have to rebuild your kernel
and iptables,
since there are some modification :)
Thanks,
zhanghailiang
COLO is still in early stage,
your comments and feedback are warmly welcomed.
Cc: netfilter-de...@vger.kernel.org
TODO:
1. Strengthen failover
2. COLO function switch on/off
2. Optimize proxy part, include proxy script.
1) Remove the limitation of forward network link.
2) Reuse the nfqueue_entry and NF_STOLEN to enqueue skb
3. The capability of continuous FT
v5:
- Replace the previous communication way between proxy and qemu with nfnetlink
- Remove the 'forward device'parameter of xt_PMYCOLO, and now we use iptables
command
to set the 'forward device'
- Turn DPRINTF into trace_ calls as Dave's suggestion
v4:
- New block replication scheme (use image-fleecing for sencondary side)
- Adress some comments from Eric Blake and Dave
- Add commmand colo-set-checkpoint-period to set the time of periodic checkpoint
- Add a delay (100ms) between continuous checkpoint requests to ensure VM
run 100ms at least since last pause.
v3:
- use proxy instead of colo agent to compare network packets
- add block replication
- Optimize failover disposal
- handle shutdown
v2:
- use QEMUSizedBuffer/QEMUFile as COLO buffer
- colo support is enabled by default
- add nic replication support
- addressed comments from Eric Blake and Dr. David Alan Gilbert
v1:
- implement the frame of colo
Wen Congyang (1):
COLO: Add block replication into colo process
zhanghailiang (28):
configure: Add parameter for configure to enable/disable COLO support
migration: Introduce capability 'colo' to migration
COLO: migrate colo related info to slave
migration: Integrate COLO checkpoint process into migration
migration: Integrate COLO checkpoint process into loadvm
COLO: Implement colo checkpoint protocol
COLO: Add a new RunState RUN_STATE_COLO
QEMUSizedBuffer: Introduce two help functions for qsb
COLO: Save VM state to slave when do checkpoint
COLO RAM: Load PVM's dirty page into SVM's RAM cache temporarily
COLO VMstate: Load VM state into qsb before restore it
arch_init: Start to trace dirty pages of SVM
COLO RAM: Flush cached RAM into SVM's memory
COLO failover: Introduce a new command to trigger a failover
COLO failover: Implement COLO master/slave failover work
COLO failover: Don't do failover during loading VM's state
COLO: Add new command parameter 'colo_nicname' 'colo_script' for net
COLO NIC: Init/remove colo nic devices when add/cleanup tap devices
COLO NIC: Implement colo nic device interface configure()
COLO NIC : Implement colo nic init/destroy function
COLO NIC: Some init work related with proxy module
COLO: Handle nfnetlink message from proxy module
COLO: Do checkpoint according to the result of packets comparation
COLO: Improve checkpoint efficiency by do additional periodic
checkpoint
COLO: Add colo-set-checkpoint-period command
COLO NIC: Implement NIC checkpoint and failover
COLO: Disable qdev hotplug when VM is in COLO mode
COLO: Implement shutdown checkpoint
arch_init.c | 243 +++++++++-
configure | 36 +-
hmp-commands.hx | 30 ++
hmp.c | 14 +
hmp.h | 2 +
include/exec/cpu-all.h | 1 +
include/migration/migration-colo.h | 57 +++
include/migration/migration-failover.h | 22 +
include/migration/migration.h | 3 +
include/migration/qemu-file.h | 3 +-
include/net/colo-nic.h | 27 ++
include/net/net.h | 3 +
include/sysemu/sysemu.h | 3 +
migration/Makefile.objs | 2 +
migration/colo-comm.c | 68 +++
migration/colo-failover.c | 48 ++
migration/colo.c | 836 +++++++++++++++++++++++++++++++++
migration/migration.c | 60 ++-
migration/qemu-file-buf.c | 58 +++
net/Makefile.objs | 1 +
net/colo-nic.c | 420 +++++++++++++++++
net/tap.c | 45 +-
qapi-schema.json | 42 +-
qemu-options.hx | 10 +-
qmp-commands.hx | 41 ++
savevm.c | 2 +-
scripts/colo-proxy-script.sh | 88 ++++
stubs/Makefile.objs | 1 +
stubs/migration-colo.c | 58 +++
trace-events | 11 +
vl.c | 39 +-
31 files changed, 2235 insertions(+), 39 deletions(-)
create mode 100644 include/migration/migration-colo.h
create mode 100644 include/migration/migration-failover.h
create mode 100644 include/net/colo-nic.h
create mode 100644 migration/colo-comm.c
create mode 100644 migration/colo-failover.c
create mode 100644 migration/colo.c
create mode 100644 net/colo-nic.c
create mode 100755 scripts/colo-proxy-script.sh
create mode 100644 stubs/migration-colo.c
--
1.7.12.4
--
Dr. David Alan Gilbert / dgilb...@redhat.com / Manchester, UK
.
