Oracle VM, User Manual

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Xen™
Glossary-3
Utility Server
A component of Oracle VM Agent. An application that handles I/O intensive
operations for virtual machines, server pools and servers, for example, copying,
moving and renaming files.
There can be more than one Utility Server in a server pool. A physical server can
perform as the Server Pool Master, Utility Server and Virtual Machine Server
simultaneously.
vif
A virtual network interface for bridging network interfaces between domUs and
dom0. When a domU is started it is assigned a number. This number is used to bridge
the network interface from eth
n to vif n.0 .
Virtual disk
A file or set of files, usually on the host file system although it may also be a remote
file system, that appears as a physical disk drive to the guest operating system.
Virtual Machine (VM)
A guest operating system and the associated application software that runs within
Oracle VM Server. May be paravirtualized or hardware virtualized machines. Multiple
virtual machines can run on the same Oracle VM Server.
Virtual Machine Manager (VMM)
See Hypervisor .
Virtual Machine Server
A component of Oracle VM Agent. An application which runs Oracle VM Server
virtual machines. It can start and stop virtual machines, and collect performance data
for the host and guest operating systems. Enables communication between the Server
Pool Master, Utility Server and Virtual Machine Servers.
There can be more than one Virtual Machine Server in a server pool. A physical server
can perform as the Server Pool Master, Utility Server and Virtual Machine Server
simultaneously.
Virtual Machine Template
A template of a virtual machine. Contains basic configuration information such as the
number of CPUs, memory size, hard disk size, and network interface card (NIC).
Create virtual machines based on a virtual machine template using Oracle VM
Manager.
VMM
See Virtual Machine Manager (VMM) .
Xen™
The Xen hypervisor is a small, lightweight, software virtual machine monitor, for
x86-compatible computers. The Xen hypervisor securely executes multiple virtual
machines on one physical system. Each virtual machine has its own guest operating
system with almost native performance. The Xen hypervisor was originally created by
researchers at Cambridge University, and derived from work done on the Linux
kernel.