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What is Xen Hypervisior ?

March 3, 2011

The Xen hypervisor is a layer of software running directly on computer hardware replacing the operating system thereby allowing the computer hardware to run multiple guest operating systems concurrently. Support for x86, x86-64, Itanium, Power PC, and ARM processors allow the Xen hypervisor to run on a wide variety of computing devices and currently supports Linux, NetBSD,
FreeBSD, Solaris, Windows, and other common operating systems as guests running on the hypervisor. The Xen.org community develops and maintains the Xen hypervisor as a free solution licensed under the GNU General Public License.

A computer running the Xen hypervisor contains three components:
Xen Hypervisor
Domain 0, the Privileged Domain (Dom0) – Privileged guest running on the hypervisor with direct hardware access and guest management responsibilities
Multiple DomainU, Unprivileged Domain Guests (DomU) – Unprivileged guests running on the hypervisor; they have no direct access to hardware (e.g. memory, disk, etc.)

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From → Linux, Xen

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