CentOS virt - Oct 2010 - performance differences between kvm/xen

I don't have any benchmarks per se just my recent testing of them....

I think xen is still on top in terms of performance and features....now
having said that my experience in the past with kvm and my latest testing
with 5.5 and KVM I can say that KVM has made great strides with the virtio
drivers for the disk and nic, my latest vm's that I am using with those
drivers are very snappy and so far I am very pleased.....I'm a big redhat
fan and think that KVM will only continue to get better and I believe at
some point will equal or pass xen....I'm waiting for rhel6 to see what they
are going to be rolling out...I have not had any time to play with the beta
or look at fedora....

On Thu, Oct 14, 2010 at 11:32 AM, Karanbir Singh <mail-lists at
karan.org>wrote:
> hi guys,
>
> Just wondering if anyone has done any performance testing between kvm
> and xen on CentOS-5 ( using centos as host and vm in every case ) ?
>
> Regards,
>
> --
> Karanbir Singh
> London, UK   | http://www.karan.org/ | twitter.com/kbsingh
> ICQ: 2522219 | Yahoo IM: z00dax      | Gtalk: z00dax
> GnuPG Key : http://www.karan.org/publickey.asc
> _______________________________________________
> CentOS-virt mailing list
> CentOS-virt at centos.org
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>
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hi guys,

Just wondering if anyone has done any performance testing between kvm 
and xen on CentOS-5 ( using centos as host and vm in every case ) ?

Regards,

-- 
Karanbir Singh
London, UK   | http://www.karan.org/ | twitter.com/kbsingh
ICQ: 2522219 | Yahoo IM: z00dax      | Gtalk: z00dax
GnuPG Key : http://www.karan.org/publickey.asc

On 10/14/2010 07:48 AM, Tom Bishop wrote:
> I think xen is still on top in terms of performance and features....now
that is indeed what it 'feels' like, but I'm quite keen on putting
some
numbers on that.
> having said that my experience in the past with kvm and my latest
> testing with 5.5 and KVM I can say that KVM has made great strides with
> the virtio drivers for the disk and nic, my latest vm's that I am using
> with those drivers are very snappy and so far I am very pleased.....I'm
I will try and get a machine up with centos dom0 and do some metrics.

- KB

One thing to possibly consider with PostgreSQL performance especially,
is that when using KVM VMs for some applications, PostgreSQL could be
run native. This is a viable approach with KVM that could never work
with Xen.

 

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On 10/15/2010 02:00 PM, John L. Magee wrote:
> One thing to possibly consider with PostgreSQL performance especially,
> is that when using KVM VMs for some applications, PostgreSQL could be
> run native. This is a viable approach with KVM that could never work
> with Xen.
Can you expand on this a little bit please ?

- KB