Glossary

control domain

A domain (commonly dom0) with permissions to create and manage other domains on the system.

dom0

Initial privileged domain started at boot time.

domain

A Xen-specific synonym to guest or VM.

domid

Numeric identifier of a running domain. Both Xen and its toolstack use them extensively as unique identifiers on the local Xen instance.

domU

One of potentially many unprivileged domains running under the hypervisor at any given point in time.

hardware domain

A domain (commonly :term`dom0`), which shares responsibility with Xen about the system as a whole. By default it gets all devices (including all disks and network cards), so is responsible for multiplexing guest I/O.

xl

A CLI tool that can be used to create, manage and shutdown a domain.