I. Background of Virtualisation (cont'd)

  1. Desktop Virtualisation

    Desktop virtualisation is also known as presentation virtualisation. To run multiple applications, instead of running the applications and displaying the interfaces on the same machine, another option is desktop virtualisation. It enables a client machine to run applications and display interfaces on other corresponding servers through remote desktop.

    The major advantage of desktop virtualisation is that the management of data and program of each application can be centralised. This saves the installation of the applications on each client machine, and improves efficiency as it decreases the communication overhead between the client and the server.

     

     

  2. Application Virtualisation

    Apart from the virtualisation of hardware and application interface, the application itself can also be virtualised. Applications may be incompatible to each other when they are run on the same operating system, for instance because of the sharing of specific Dynamic Link Libraries (DLLs) or registry entries.

    Application virtualisation is a way to solve the problem. It includes the shared resource and the actual application in a virtual application. Resource causing incompatibility is duplicated in each virtual application. Hence, incompatible applications are possible to be run on the same operating system.

     

     

  3. Virtual Infrastructure Cloud Computing

    While virtualising a single physical computer by hardware virtualisation is already popular, building a Virtual Infrastructure is another way to implement hardware virtualisation.

    Servers, storage devices, network bandwidth on the entire infrastructure can be combined into a pool of resources to be dynamically allocated. Virtual machines can be shared over the entire infrastructure, hosting various operating systems and applications.

Case Study

Implement virtualization in UNIX environment

A full refresh of the server environment was completed using 12 x IBM UNIX servers using logical & virtual partitioning which allows the department to run multiple independent servers on a single physical server.

See the article: http://www.origina.ie/site-map/about-origina/41/93

 
Reference:
http://www.vmware.com/Virtualization/what-is-Virtualization.html
http://www.microsoft.com/Virtualization/