Virtualisation

The first thing that springs to mind if anyone hears the word virtualisation in connection with IT is server virtualisation. The virtualisation of servers has some clear advantages for companies. If you use the right tools you can avoid some pitfalls and obstacles at the beginning. It is not just servers that can be virtualised; clients and applications too!
Although a virtual machine can be set with just a few mouse clicks, the devil is in the details – T&N has years of experience and helps you along.

Server virtualisation has proven itself in practice and become established across the board. Anyone who jumps on the bandwagon now has the advantage that they can profit from others’ experience. Medium-sized businesses in particular are lagging behind: only around one fifth of all SMEs actually use server virtualisation.
 
Even though it has a number of advantages. One of them is the greater flexibility: it is easier to absorb demand surges if the users can be assigned to resources as necessary. What’s more, physical servers generally have only a low capacity utilisation (approx. 20 percent). The remaining capacities are not used. A capacity utilisation of up to 80 percent is possible with virtual servers. This saves companies money that would otherwise be spent on hardware, cooling, installation space and energy. In addition, correctly configured virtual servers offer a higher system stability compared to a conventional architecture.

Any virtualisation project in a company should begin with an extensive inventory of the existing IT environment and server infrastructure. The capacities and workloads have to be calculated in this case. What is important here is to calculate the capacity utilisation of the old servers and then set priorities. Some servers and workloads can be virtualised with no problems, others require special preparations. Furthermore, the requirements on the infrastructure have to be determined and the question asked as to whether a complete new installation is sensible and how the hosts should be designed.

 

Server virtualisation

Server virtualisation
 

The innovations of hardware manufacturers have led to much more performance being provided for each piece of server hardware nowadays. Technologies such as server virtualisation allow the continued efficient use of this increasing performance and at the same time the operation of several independent server instances on the same hardware.

A differentiation is generally made between virtual host and virtual machine:

  • Virtual Host: server hardware to operate several logical server instances
  • Virtual Machine: logislogical server instance that runs parallel to other VMs on the same hardware (Virtual Host).

Server virtualisation lets us:
  • operate several independent server operating systems on the same physical server simultaneously
  • simplify data and system backups
  • cost effectively increase the system stability of the servers
  • increase the flexibility, e.g. during server maintenance
  • reduce the dependence of server instances on hardware
  • reduce the operating costs for servers
  • cut energy consumption in the computer center by consolidating the server hardware

It was only through the evolutionary step of server virtualisation that today’s widespread offers and services such as cloud computing or desktop virtualisation became possible.

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Representation of a classic server installation Representation of a virtual server installation


















 

Desktop virtualisation

Desktop virtualisation
 

Desktop virtualisation allows you to provide customised Windows interfaces (desktop) of users on random terminals. Users can access their familiar business platform from almost anywhere in the world.

Desktop virtualisation lets us:

  • work from any place
  • increase data security, integrity, confidentiality and availability
  • introduce new desktop software (e.g. Windows 8) more flexibly
  • create more attractive working conditions by using new technologies
  • do away with a specific backup strategy thanks to a centralised desktop management
  • make a big cut in operating costs through centralised management
  • reduce the procurement and operating costs of terminals through possibilities with ThinClients
  • to operate ICT systems better and in a more integrated manner
  • react quickly and easily to the individual needs of companies
XenDesktop.gif

 


 

Application virtualisation

Application virtualisation
 

What could be more important that your programs and the corresponding data? With application virtualisation it is possible to start applications on any terminal from the central provision center without them having to be installed on the terminal. This means that you can carry out updates and changes to your applications at any time without affecting the Windows desktop and other programs.

Similar to server and desktop virtualisation, the various programs are abstracted from the operating system with application virtualisation.


Application virtualisation lets us:

  • introduce new desktop software (e.g. Windows 8) more easily
  • do away with a specific backup strategy thanks to a centralised desktop management
  • make a big cut in operating costs through centralised management
  • provide applications centrally for any user and on any terminal by transforming the apps into a Private Cloud Service

 
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