Citrix XenServer

From Citrix Systems:

Citrix XenServer is a free, enterprise-class, cloud-proven virtualization platform. XenServer contains all the capabilities required to create and manage your virtual infrastructure. Included at no charge, XenMotion allows customers to move live, running applications between hosts without any downtime. Also included is the XenCenter management console, XenConvert--a physical to virtual machine conversion utility, disk snapshot and active directory integration. Combined with a high performance, reliable and scalable hypervisor, these valuable features enable organizations of any size to immediately benefit from server virtualization. Install and set up XenServer in less than ten minutes and virtualize even your most demanding workloads. When you're ready, simply add the premium edition of XenServer that suits your unique needs for a rich set of management and automation capabilities.

Key features of the free edition of XenServer include: Unlimited virtualization. Download and use XenServer on as many hosts as you'd like; install as many virtual machines across as many CPUs and as much memory as you need. Bare-metal performance. Built on the open-source Xen hypervisor, XenServer's compact architecture has the lowest overhead of any server virtualization solution, offering near bre-metal performance. Live migration. XenMotion allows virtual machines to be moved from one host to another without any application downtime. XenCenter management console. XenCenter delivers scalable setup and administration to XenServer environments. Unlike other management consoles, XenCenter distributes management data across servers in a resource pool to ensure there is no single point of management failure. Full infrastructure tools and integration. Includes XenConvert and the OVF to automate the conversion of physical or virtual servers to XenServer, Active Directory integration and native support for disk snapshots and reverts.

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