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Re: [Qemu-block] [Qemu-devel] [PATCH COLO-BLOCK v7 00/17] Block replicat


From: Michael R. Hines
Subject: Re: [Qemu-block] [Qemu-devel] [PATCH COLO-BLOCK v7 00/17] Block replication for continuous checkpoints
Date: Mon, 06 Jul 2015 19:25:54 -0500
User-agent: Mozilla/5.0 (X11; Linux i686; rv:31.0) Gecko/20100101 Thunderbird/31.7.0

On 07/04/2015 07:46 AM, Wen Congyang wrote:
At 2015/7/3 23:30, Dr. David Alan Gilbert Wrote:
* Wen Congyang (address@hidden) 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

Sorry, the option export is removed, because we use the qmp command nbd-server-add to let a BB be NBD server.


Still doesn't work. The server says:

nbd.c:nbd_receive_options():L447: read failed
nbd.c:nbd_send_negotiate():L562: option negotiation failed

- Michael




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