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Re: [Xen-users] Unable to hot-add disk to Win2K3 HVM with GPLPV drivers

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Unable to hot-add disk to Win2K3 HVM with GPLPV drivers
From: Andy Burns <lists.xensource.com@xxxxxxxxxxxxxx>
Date: Thu, 03 Jul 2008 15:29:26 +0100
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On 03/07/2008 09:14, Andy Burns wrote:

I wanted to add another LVM based partition for IOmeter testing

With 1MB blocks, all reads or all writes, either random or sequential, performance always seems to be about 50MB/s, with a 50:50 mix of read/write it drops to 30MB/s.

With 4KB blocks, all reads, either random or sequential, performance is 20MB/s, this doesn't seem too bad considering the difference in block size, but with all writes the performance plummets to under 1MB/s.

One surprising good result, using 2 separate disks, with two worker threads, and 1MB blocks, all reads or all writes, either random or sequential, the total performance is 180MB/s.



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