How to install Xen 4.1 on CentOS 5 default kernel?
blog.teamgrowth.net
What is Xen ?
Xen is a bare metal Hypervisor which is able to run different and multiple operating systems on a single physical machine. The concept of running an operating system over another operating system is known as Virtualization.
Xen is an enterprise level production ready Virtualization Hypervisor which is able to run OS’s like Windows, RHEL, CentOS, BSD and OpenSUSE.
Xen is called HyperVisor because Xen itself is a special kernel which starts the base OS. The base OS in Xen Virtualization is usually called as Dom-0 and the Virtual Machines which run on Xen Hypervisor are known as Dom-U.