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

[Andy Burns <lists.xensource.com@xxxxxxxxxxxxxx>]

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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