> KVM was a dog in testing under CentOS and RHEL 5.x. The bridged >networking has *NO* network configuration tool that understands >how to set it up, you have to do it manually, and that's a deficit I've >submitted upstream as an RFE. It may work well with CentOS and >RHEL 6, i've not had a chance to test it. Back when I was searching for a suitable virtualization platform, I found no difference in performance between Xen and KVM. I liked both, but settled on KVM. ESXi back then was very limited in hardware support, so I never got to play with it much. People seem to like it. And it's true that bridged networking support in centos 5 requires that you set up it manually, but that's what led me to learn ifcfg scripts. It's so simple.