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RE: [Xen-users] I want to know if.....

To: <jonr@xxxxxxxxxx>, "Venefax" <venefax@xxxxxxxxx>, <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: RE: [Xen-users] I want to know if.....
From: "Nick Couchman" <Nick.Couchman@xxxxxxxxx>
Date: Thu, 26 Feb 2009 19:17:35 -0700
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Xen also allows for both para-virtualization and full virtualization of guests.
I wouldn't say that KVM would lose 75% of Linux guest's performance, but certainly 15-20% at the least.

>>> "Venefax" <venefax@xxxxxxxxx> 2009/02/26 16:32 >>>
It is not true at all. KVM and Xen are fundamentally different and address
different problems. Xen allows for fast para-virtualization of Linux Domus,
while KVM only fully-virtualizes. Nobody in his right mind would use KVM for
a linux DOMu, because it would lose 75% of its performance, compared to
para-virtualization. So KVM is for windows on Xen, but it will never replace
Xen in the datacenter.

-----Original Message-----
From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx
[mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of jonr@xxxxxxxxxx
Sent: Thursday, February 26, 2009 6:23 PM
To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] I want to know if.....

Quoting Mauro <mrsanna1@xxxxxxxxx>:

> xen is no more developed?
> I've heard that xen is no more developed and kvm is more considered by

That is not true. I think what you have heard is that RedHat has moved 
from Xen to KVM as their virtualization platform.

Xen development is still continuing and moving at a fast pace with 
hope of dom0 support for inclusion in the 2.6.30 kernel.

If I have mis-spoke will someone please correct me.


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