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Date: Wed, 10 Sep 2008 11:51:35 -0500
From: Anthony Liguori <aliguori@us.ibm.com>
MIME-Version: 1.0
Subject: Re: [Qemu-devel] [PATCH 10/10] TCP based live migration
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To: Blue Swirl <blauwirbel@gmail.com>
Cc: Chris Wright <chrisw@redhat.com>, Uri Lublin <uri.lublin@qumranet.com>, qemu-devel@nongnu.org, kvm@vger.kernel.org

Blue Swirl wrote:
> On 9/9/08, Anthony Liguori <aliguori@us.ibm.com> wrote:
>   
>> This patch introduces a tcp protocol for live migration.  It can be used as
>>  follows:
>>
>>  qemu-system-x86_64 -hda ~/images/linux-test.img -monitor stdio
>>   <vm runs for a while>
>>  (qemu) migrate tcp:localhost:1025
>>
>>  On the same system:
>>
>>  qemu-system-x86_64 -hda ~/images/linux-test.img -incoming tcp:localhost:1025
>>
>>  The monitor can be interacted with while waiting for an incoming live migration.
>>     
>
> With command line switches, you have to know when starting the VM that
> it is going to accept an incoming migration. Would it be possible to
> change this so that the incoming migration could be triggered from
> monitor? For example to migrate back to original host?
>   

Yup.  The main reason for an -incoming flag is it makes the ssh: 
protocol easier to implement (not included here).

I'll add a monitor command too.

Regards,

Anthony Liguori