Citrix XenServer is a virtualization platform that offers near bare metal virtualization performance for virtualized server and client operating systems. XenServer uses the Xen hypervisor to virtualize each server on which it is installed, enabling each server to host multiple virtual machines (VMs) simultaneously with guaranteed performance. XenServer provides its own operating system to administer the physical and virtual resources of a XenServer host, and therefore, it does not require a specific operating system. XenServer supports Linux and Windows guest operating systems.
XenServer resources can be managed at three levels:
A XenServer host object represents a physical host on which XenServer and its VMs run. A XenServer host can be a stand-alone host or associated with a XenServer pool. You can monitor virtual and physical resources available on a XenServer host, manage storage repositories containing virtual disk images, manage tasks, or run the XenServer host in maintenance mode.
A resource pool is a connected group of up to 16 XenServer hosts. Combined with shared storage and dynamically controlled memory, CPU, and networking resources, the XenServer hosts in a resource pool provide an operating environment on which VMs run. You can manage the membership or role of the XenServer hosts in a pool, and can let XenServer monitor the health of the pool members for high availability. If necessary, VMs are live migrated between pool hosts to avoid downtime.
On the VM management level, you can perform the following tasks:
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