Citrix XenServer is a production-ready, fully-functional, bare-metal hypervisor, XenServer uses the Xen hypervisor to virtualize each server on which it is installed, enabling each to host multiple Virtual Machines simultaneously with guaranteed performance. XenServer allows you to combine multiple Xen-enabled servers into a powerful Resource Pool, using industry-standard shared storage architectures and leveraging resource clustering technology created by XenSource.In doing so, XenServer extends the basic single-server notion of virtualization to enable seamless virtualization of multiple servers as a Resource Pool, whose storage, memory, CPU and networking resources can be dynamically controlled to deliver optimal performance, increased resiliency and availability, and maximum utilization of data center resources. To start the XenServer installation process follow this instruction.