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Re: [Xen-users] Xen disk IO performance

To: Dave Brown <daveb21@xxxxxxxxx>
Subject: Re: [Xen-users] Xen disk IO performance
From: Stefan Berner <Stefan.Berner@xxxxxxxxxxxxxxx>
Date: Thu, 20 Sep 2007 09:03:16 +0200
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Dear Dave,

what kind of benchmark did you do? We did a Cache/Memory  benchmark as
well as a transfer rate benchmark to a Lustre system.
Quite supprising for as was, that the CPU cache performance was quite
bad but the other benchmarks showed in mean about 20% overhead. If you
are interested in detailed details you can contact me.



Dave Brown wrote:
> Hi All,
> Has anyone out there got any impressions or have done any testing of
> disk IO performance in a Xen VM. I've done some testing in-house here
> and compared it to native, VMware Server and VMware ESX and come up
> with some results which are quite surprising. Any info anyone has on
> this would be great.
> I'm quite happy to share the results but I'd rather not say just yet
> for fear of introducing bias into everyone's existing thoughts / results.
> Cheers
> *Dave Brown* 
> IT Consultant
> Loftus IT 
> 175 Fullarton Rd 
> Dulwich SA 5065
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