[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH V4 0/3] Block migration if any of the block devi

From: Stefan Hajnoczi
Subject: Re: [Qemu-devel] [PATCH V4 0/3] Block migration if any of the block device is busy
Date: Tue, 24 Jul 2012 11:04:07 +0100

On Tue, Jul 24, 2012 at 10:52 AM, Kevin Wolf <address@hidden> wrote:
> Am 23.07.2012 16:22, schrieb address@hidden:
>> From: Benoît Canet <address@hidden>
>> This patchset is designed to avoid starting a live migration while any of
>> the block device is busy.
>> Tested with the following sequence:
>> QEMU 1.1.50 monitor - type 'help' for more information
>> (qemu) block_stream virtio0 1k
>> (qemu) migrate tcp:localhost:4444
>> migrate: Migration is blocked by streaming
>> (qemu)  block_job_cancel virtio0
>> (qemu)  migrate tcp:localhost:4444
>> migrate: Connection can not be completed immediately
>> (qemu)
>> => migration then succeed
> Maybe I'm missing the obvious, but why? Migration will stop the
> streaming if it isn't restarted explicitly on the destination, but I
> think that's expected.

Hmm...maybe this is a policy decision.  I figure if you are running
image streaming and try to migrate, chances are you're migration will
break on the destination host because you were trying to do pre-copy
storage migration and never finished.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]