[Xen-users] How to get rid of IO-Bottleneck?

[Fabian Zimmermann <xen-users@xxxxxxxxxxxxxxxxx>]

Hi,

I'm running a Xen (Debian Lenny / 3.3.1 / 2.6.18.8 / 2x1T SATA RAID1 / 
8G RAM)-Server with ~8-12 VMs (LVM based - NOOP shedule). Each VM is 
running Postgre, Tomcat, Apache. If we do our daily testings, the 
disk-io-performance  is terrible.
As far as I understood reads are cached within the VMs, so this should 
not be the problem. I think the high number of writes is killing the 
hdd. Is there a way to do something like "async write", or what else 
could I do to speedup the VMs even if there is a lot of disk-io?
Thanks,
Fabian

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