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. <div><br></div><div>Just my 2 cent.. <br>
<br><div class="gmail_quote">On Thu, Oct 7, 2010 at 11:48 AM, Justin Clift <span dir="ltr"><<a href="mailto:jclift@redhat.com">jclift@redhat.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
<div class="im">On 10/07/2010 01:20 AM, Mindaugas Riauba wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Hello,<br>
<br>
In RHEL6 beta virtualization document<br>
(<a href="http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/sect-Virtualization-Virtualization_limitations-KVM_limitations.html" target="_blank">http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization/sect-Virtualization-Virtualization_limitations-KVM_limitations.html</a>)<br>
it is written that "Live migration is only possible with CPUs from the<br>
same vendor (that is, Intel to Intel or AMD to AMD only).<br>
<br>
But in KVM Wiki (<a href="http://www.linux-kvm.org/page/Migration" target="_blank">http://www.linux-kvm.org/page/Migration</a>) I see that<br>
"You can migrate a guest between an AMD host to an Intel host and<br>
back".<br>
<br>
What could be the state of this in RHEL6 final? It is somewhat<br>
important for us because now we have Intel/AMD mix for RHEL5 Xen hosts<br>
and need to plan several more servers for virtualization.<br>
I understand that I will be able to use RHEL5 Xen as hosts for quite<br>
some time still. But since many things improved during those years I<br>
would like to move to new platform when it's ready. Not production<br>
boxes on day-0 of course. :)<br>
</blockquote>
<br></div>
Just asked internally, and got this info:<br>
<br>
********************************************************************<br>
<br>
Cross vendor migration is not supported neither for kvm or xen.<br>
<br>
It can work in theory but it's not complete. Also the extra<br>
flexibility cost performance since the virtualized cpu needs to be<br>
[the] least common denominator.<br>
<br>
For these reasons it's out of RHEL for the foreseen future.<br>
Keep enjoying Xen and hope you'll try out kvm soon as well.<br>
<br>
Thanks,<br>
Dor<br>
<br>
********************************************************************<br>
<br>
Safest bet looks to be sticking with the same CPU Vendor where you<br>
need to do migration.<br>
<br>
Hopefully that helps. :)<br>
<br>
Regards and best wishes,<br><font color="#888888">
<br>
Justin Clift</font><div><div></div><div class="h5"><br>
<br>
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</div></div></blockquote></div><br><br clear="all"><br>-- <br>.: war|ola :.<br>Use Fedora Linux for better computing experience<br><a href="http://fedoraproject.org">http://fedoraproject.org</a><br>
</div>