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RE: [Xen-devel] Migration questions

from [Ian Pratt]

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To:	"Eric Tessler" <maiden1134@xxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] Migration questions
From:	"Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date:	Wed, 9 Mar 2005 01:44:14 -0000
Cc:	<ian.pratt@xxxxxxxxxxxx>
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Thread-topic:	[Xen-devel] Migration questions

> Second, when a VM is migrated, is there a way to keep a 
> permanent ID assigned to the VM?  For example, if I create my 
> VM and assign it an ID of 500, when I migrate the VM to a new 
> machine, will the VM still have an ID of 500?  My 
> understanding is that XEN will assign a new ID to the VM.

The name will stay constant. The domain id is only a temporary thing and
will not be preserved across migration (it can even change across VM
reboots on the same machine). Think of it like a PID.

If you're configuring devices etc for a domain you should key it off the
name, not the domain id.

Ian



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