On Sat, 2006-12-30 at 18:15 -0500, Mike Chalmers wrote: > I was wondering if anyone new about these and would explain them to me? Thanks. > Short and simple. Xen requires (in most cases *) a modified host and guest kernel and uses its own management tools. KVM requires certain extensions (Intel VT, AMD Pacifica/SVM **) to be present on the host CPU and uses the QEMU front-end. As for what-to-use, well, a couple of questions: A. What type of guest do you plan to virtualize? Windows? Linux? BSD? B. Can you used kernel-modified guests? C. Are you using VT/SVM enabled hardware? D. Do you require additional features beyond "simple" virtualization? (E.g. migration, snapshots, etc) - Gilboa * Xen does support VT/SVN enabled hardware - but AFAIK it requires more over-head then KVM. ** Supported CPU cores: Intel: P4 6xx, D9xx, Core Duo, Core 2 Duo, Xeon 3xxx/5xxx/7xxx. AMD: Athlon64 AM2, AMD Opteron s1207/1xxx/2xxx/8xxx.