Xen in action: Deploying multiple servers
Most organizations operate multiple platforms within their IT infrastructures. If anything, heterogenous infrastructures have been bolstered as vendor support has increased for virtualized server and workstation solutions. VMware currently dominates the virtualization marketplace with its almost unchallenged line of ESX Server and Workstation products (not to mention the free VMware Player), but XenWorks has recently stepped forward as a challenger. Its flagship virtualization product Xen 3.0 has been heavily touted as the big alternative to VMware, particularly for Linux, and even comes integrated with commercial SuSE and Red Hat Enterprise solutions.
This article briefly examines the current state of affairs for multiple server deployment, with an emphasis on modern advancements in virtual servers and workstations. The most common configurations use three primary techniques: Partition, Emulate and Virtualize.