Citrix’s XenServer is a hypervisor that loads and runs directly on a bare server, rather than as an application on a host OS much like the market-leading VMware ESX server. The processors do need to support Intel VT or AMD-V virtualisation technologies, but that’s not been an issue for some time and anything bought recently will support these as standard. with a slicker interface and lots of new features, including the ability to define metadata to group and tag virtual machines.

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