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Re: [Xen-users] Xen disk IO performance

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Xen disk IO performance
From: "Dave Brown" <daveb21@xxxxxxxxx>
Date: Thu, 20 Sep 2007 12:47:50 +0930
Cc: Steven Hu <learn.hu@xxxxxxxxx>
Delivery-date: Wed, 19 Sep 2007 20:18:40 -0700
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I am using linux based tools such as stress, iostat, bonnie and dd.

The numbers will obviously not match up with the PCMark numbers but what I am looking for is how much of a disk IO performance hit occurs with Xen vs Native and VMware vs native.

Steven - let me know if you still want the results.


On 9/20/07, Steven Hu <learn.hu@xxxxxxxxx > wrote:
How do you do the test? When I run PCMark 2005, the score of HDD is not stable, sometime is 2300 scores, and sometims is 3300 scores. It also fails some times.
Couls you share your results with me? thanks.

2007/9/20, Dave Brown <daveb21@xxxxxxxxx>:
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.

Dave Brown 
IT Consultant

Loftus IT 
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Dulwich SA 5065

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