RE: [Xen-users] best guest disk performance?

["Petersson, Mats" <Mats.Petersson@xxxxxxx>]

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> Tom Horsley
> Sent: 21 December 2006 13:02
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] best guest disk performance?
> 
> We'll soon be turning the machine we've been doing testing 
> with into a production
> system designed primarily to provide several different linux 
> distributions as HVM guests
> for us to use to build and test our software under different 
> flavors of linux.
> 
> As build systems, they will be doing lots and lots of disk 
> writes compiling stuff.
> 
> There appear to be about a gazillion different ways to setup 
> the disks for the
> guests, and I'm wondering if anyone has any performance 
> numbers saying which
> one is best?

There's probably many variants that will make some small difference, but
I'd say Para-Virtual drivers are a must for good HVM disk performance.
Whether you then connect the virtual disk to a partition, LVM volume,
file or otherwise will be of much more minor importance, because that's
going to give you the 1.1x or 1.5x performance improvement, while the
former probably delivers in the region of 3x performance boost. 

--
Mats
> 
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