Oracle Audio Technologies E10898-02 Manual Do Utilizador

Xen™ Technology

Oracle VM Server User’s Guide

administration costs, fewer computers can be used to achieve the same goal. 
Administration and physical setup is less time consuming and costly.

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: Virtual machines run in sand-boxed environments. They cannot access 

each other, so if one virtual machine performs poorly, or crashes, it does not affect 
any other virtual machine.

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: In a virtualized environment, a broad, heterogeneous array 

of hardware components is distilled into a uniform set of virtual devices presented 
to each guest operating system. This reduces the impact across the IT organization: 
from support, to documentation, to tools engineering.

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: With traditional bare-metal operating system installations, when 

the hardware vendor replaces a component of a system, the operating system 
vendor is required to make a corresponding change to enable the new hardware 
(for example, an ethernet card). As an operating system ages, the operating system 
vendor may no longer provide hardware enabling updates. In a virtualized 
operating system, the hardware remains constant for as long as the virtual 
environment is in place, regardless of any changes occurring in the real hardware, 
including full replacement.

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.

The Xen hypervisor has been improved and included with Oracle VM Server.

Oracle VM is a platform that provides a fully equipped environment for better 
leveraging the benefits of virtualization technology. Oracle VM enables you to deploy 
operating systems and application software within a supported virtualization 
environment. The components of Oracle VM are:

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: Provides the user interface, which is a standard ADF 

(Application Development Framework) web application, to manage Oracle VM 
Servers, virtual machines, and resources. Use Oracle VM Manager to:

Create virtual machines from installation media or from a virtual machine 
template

Delete virtual machines

Power off virtual machines

Upload virtual machines

Deploy virtual machines

Perform live migration of virtual machines

Import and manage ISOs

Create and manage virtual machine templates

Create and manage sharable hard disks