From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36912) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZAD7Z-0002kg-VA for qemu-devel@nongnu.org; Wed, 01 Jul 2015 04:11:55 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZAD7Y-0005ps-B6 for qemu-devel@nongnu.org; Wed, 01 Jul 2015 04:11:53 -0400 Date: Wed, 1 Jul 2015 09:11:39 +0100 From: "Dr. David Alan Gilbert" Message-ID: <20150701081138.GA2137@work-vm> References: <20150618160618.GF822@stefanha-thinkpad.redhat.com> <55836860.2010401@cn.fujitsu.com> <20150619104953.GB9807@stefanha-thinkpad.redhat.com> <5584DEA8.80005@gmail.com> <20150624140755.GC2206@work-vm> <558B52EE.3000800@cn.fujitsu.com> <20150626190335.GN2186@work-vm> <559099E5.6080205@cn.fujitsu.com> <20150630190146.GE2142@work-vm> <55933BDC.40401@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <55933BDC.40401@cn.fujitsu.com> Subject: Re: [Qemu-devel] [Qemu-block] [PATCH COLO-Block v6 07/16] Add new block driver interface to connect/disconnect the remote target List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Wen Congyang Cc: Kevin Wolf , Fam Zheng , Wen Congyang , qemu block , Stefan Hajnoczi , Jiang Yunhong , Dong Eddie , qemu devel , Max Reitz , Lai Jiangshan , Gonglei , Stefan Hajnoczi , Paolo Bonzini , Yang Hongyang , zhanghailiang * Wen Congyang (wency@cn.fujitsu.com) wrote: > On 07/01/2015 03:01 AM, Dr. David Alan Gilbert wrote: > > * Wen Congyang (wency@cn.fujitsu.com) wrote: > >> On 06/27/2015 03:03 AM, Dr. David Alan Gilbert wrote: > > > > > > > >>> Ah, I hadn't realised you could do that; so do you just do: > >>> > >>> migrate_set_parameter colo on > >>> migrate -d -b tcp:otherhhost:port > >>> > >>> How does the secondary know to feed that data straight into the disk without > >>> recording all the old data into the hidden-disk ? > >> > >> hidden disk and active disk will be made empty when starting block replication. > > > > Hmm, yes - I think I need to update to your current world; in the version > > from the end of May, I get a 'error while loading state for instance 0x0 of device 'block'' > > if I try to use migrate -d -b > > (the bdrv_write fails) > > Can you give me both primary and secondary qemu's command? I think the command line is wrong, > and disk migration fails. > Primary: ./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=$PWD/ifup-prim,\ downscript=no,colo_script=$PWD/qemu/scripts/colo-proxy-script.sh,colo_nicname=em4 \ -device e1000,mac=9c:da:4d:1c:b5:89,id=net-pci0,netdev=hn0 \ -drive if=virtio,driver=quorum,read-pattern=fifo,no-connect=on,\ cache=none,aio=native,\ children.0.file.filename=./bugzilla.raw,\ children.0.driver=raw,\ children.1.file.driver=nbd,\ children.1.file.host=ibpair,\ children.1.file.port=8889,\ children.1.file.export=colo1,\ children.1.driver=replication,\ children.1.mode=primary,\ children.1.ignore-errors=on Secondary: ./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 \ -drive if=none,driver=raw,file=bugzilla.raw,id=nbd_target1,cache=none,aio=native \ -drive if=virtio,driver=replication,mode=secondary,export=colo1,throttling.bps-total-max=70000000,\ file.file.filename=/run/colo-active-disk.qcow2,\ file.driver=qcow2,\ file.backing_reference.drive_id=nbd_target1,\ file.backing_reference.hidden-disk.file.filename=/run/colo-hidden-disk.qcow2,\ file.backing_reference.hidden-disk.driver=qcow2,\ file.backing_reference.hidden-disk.allow-write-backing-file=on \ -incoming tcp:0:8888 Thanks, Dave > >>>> If the user uses mirror job, we don't cancel the mirror job now. > >>> > >>> It would be good to get it to work with mirror, that seems preferred these > >>> days to the old block migration. > >> > >> In normal migration, is mirror job created and cancelled by libvirt? > > > > Yes, I think so; you should be able to turn on full logging on libvirt and > > watch the qmp commands it sends. > > Supporting mirror job in my TODO list now. But I think we should focus the basci function now. > > Thanks > Wen Congyang > > > > > Dave > > > > -- > > Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK > > . > > > -- Dr. David Alan Gilbert / dgilbert@redhat.com / Manchester, UK