On 01/22/2009 09:31 AM, Kai Schaetzl wrote: > Dennis J. wrote on Wed, 21 Jan 2009 20:00:24 +0100: > > >> Doing a "hdparm -t" on the host system consistently gives >> me a result of about 70MB/sec yet in a KVM guest I get results ranging from >> 40MB/sec to 125MB/sec on each run. >> > > The higher results after the first run are from caching. Xen will give you > just a little bit less than the host. We are using only Xen and are happy with > it. If you want to use CentOS on CentOS, there's nothing that beats Xen. > Absolutely stable, reliable and good performance. > same results here. 5.2 guest on 5.2 rocks. I have half a dozen installations (as in physical machines), one of them including several oracle instances as VMs [*], and not a single issue. [*] no comment on oracle as VMs, please. it was not my decision.