> > For RHEL 5 and CentOS 5, I found KVM to be useless. The management > tool is not good, and the bridged networking requirement is very > awkward, and it performed like a dog being beaten with a missing leg. What guest OS have you tried? RHEL5.4 and up come with Virtio drivers so using virtio devices RHEL 5.4+guests will provide good preformance > > I'm interested in trying it for RHEL 6 and CentOS 6, Indeed you should see performance boost on RHEL6 > but until then > I'm personally relying on VMWare ESX for institution virtualization, Then you should compare to RHEV and not to RHEL + virt-manager (RHEV also has Virtio drivers for windows guests) > and Virtualbox because it's a much more usable configuration interface > tool and uses "Right-Ctrl" to release the mouse from the virtualized > console instead of "Ctrl-Alt". With RHEV you'll have SPICE, that does not need both as after installation of the guest tools it does not grab the mouse. >VMWare could learn a lot from Sun's and > now Oracle's efforts with that tool.