Just to add (tho might be out of topic a bit) U can use RHEV (which is based
on KVM) and setup different virtualization clusters of AMD and Intel so they
only migrate towards each other.
Just my 2 cent..
On Thu, Oct 7, 2010 at 11:48 AM, Justin Clift wrote:
> On 10/07/2010 01:20 AM, Mindaugas Riauba wrote:
>
>> Hello,
>>
>> In RHEL6 beta virtualization document
>> (
>> http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/sect-Virtualization-Virtualization_limitations-KVM_limitations.html
>> )
>> it is written that "Live migration is only possible with CPUs from the
>> same vendor (that is, Intel to Intel or AMD to AMD only).
>>
>> But in KVM Wiki (http://www.linux-kvm.org/page/Migration) I see that
>> "You can migrate a guest between an AMD host to an Intel host and
>> back".
>>
>> What could be the state of this in RHEL6 final? It is somewhat
>> important for us because now we have Intel/AMD mix for RHEL5 Xen hosts
>> and need to plan several more servers for virtualization.
>> I understand that I will be able to use RHEL5 Xen as hosts for quite
>> some time still. But since many things improved during those years I
>> would like to move to new platform when it's ready. Not production
>> boxes on day-0 of course. :)
>>
>
> Just asked internally, and got this info:
>
>
>
> Cross vendor migration is not supported neither for kvm or xen.
>
> It can work in theory but it's not complete. Also the extra
> flexibility cost performance since the virtualized cpu needs to be
> [the] least common denominator.
>
> For these reasons it's out of RHEL for the foreseen future.
> Keep enjoying Xen and hope you'll try out kvm soon as well.
>
> Thanks,
> Dor
>
>
>
> Safest bet looks to be sticking with the same CPU Vendor where you
> need to do migration.
>
> Hopefully that helps. :)
>
> Regards and best wishes,
>
> Justin Clift
>
>
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