Re: [Xen-users] xen disk io performance

["Fajar A. Nugraha" <list@xxxxxxxxx>]

On Mon, Nov 28, 2011 at 4:03 PM, Alexandre Chapellon
<a.chapellon@xxxxxxxxx> wrote:
> disk =[ 'phy:/dev/xendata/postgresql-syslog:xvdb1:w']
>
> What can be done to improve disk IO and throuput?

Well, for starters, are you sure this is a Xen issue?

Try something simple:
- mount the LV on dom0 (use "xm block-attach 0" or kpartx and
pvscan/vgchange if necessary)
- do a chroot, and start postgres
- give it some load (e.g. sysbench)
- cleanup (unmount, xm block-detach, etc)
- repeat sysbench on domU

-- 
Fajar

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