Virtualisation

Save space and utilise the performance of your servers efficiently, by consolidating them using Virtualisation technology.

Virtualisation allows you to host multiple servers or virtual machines on one physical server platform.  This saves floor/rack space since you'll have much less physical hardware.  In addition to this, costs for electricity, etc will be much less than running multiple servers.

For virtualisation we normally provide Linux® based solutions using Citrix XenServer or Linux-based distributions with Xen installed, although there are other Linux based solutions that we can also provide, such as KVM.  We also have experience of VMware Server and ESX as well and have used and deployed this in our own environments when testing and comparing virtualised solutions.

Depending on the solution and the system being used, you can have para-virtualised environments versus fully virtualised environments.  All Linux-based virtualised servers/machines are able to utlise para-virtualisation due to the fact that it requires a modified Linux kernel enabling para-virtualisation features.  Para-virtualisation achieves native performance for the virtualised machine so that it runs just like it was a physical server.  Performance might be slightly reduced but negligible.  Windows-based virtualisation tends to be fully virtualised and as such uses virtual hardware.  Because of this, Windows-based virtual servers/machines tend to run much slower than their para-virtualised counterparts.  However, Xen does offer para-virtualised drivers for Windows, which means you can improve the performance of your Windows-based virtual machines.