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What is Virtualisation?


Today Virtualisation plays a major part in corporate computing infrastructures; however it is often used to generalise about a plethora of technologies, which at best can sometimes be daunting and confusing. To many it simply means server Virtualisation technologies such as VMware, Citrix, Hyper-V etc.

Virtualisation does not just consist of server virtualisation; it also applies to the network, storage, application and desktop environments too.

What is Server Virtualisation?

Out of all of the different types of virtualization, server virtualisation is the most familiar. When people refer to "virtualisation", they are usually refering to server virtualisation.

In simple terms, virtualisation allows you to run multiple guest computers on a single host computer. The guest computers function as though stand-alone and running on dedicated hardware. By doing this, you gain all the benefits of any type of virtualization: portability of guest virtual machines, reduced operating costs, reduced administrative overhead, server consolidation, testing & training, disaster recovery benefits, and more.

At SDT we have unravelled the complexities of virtualisation and have detailed the features of two of the major players for server virtualisation; VMware, Citrix and Hyper-V.

How Virtualisation Works

The heart of virtualization is the “virtual machine” (VM), which is an isolated software container with an operating system and application inside. Because each virtual machine is completely separate and independent, many of them can run simultaneously on a single computer. A thin layer of software called a hypervisor decouples the virtual machines from the host and dynamically allocates computing resources to each virtual machine as needed.

Therefore; each physical server's resources are utilised to full capacity and hence reducing costs by reducing the physical server estate.

If your business has three or more servers you could benefit from Server Virtualisation. There are significant financial and operational benefits that make virtualisation an important factor to consider for any business. By consolidating servers your business can save on hardware, power and cooling costs as well as implementing a more robust and resilient solution.


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