July 26, 2011
I begin this article with an assumption that you already know what server (hardware) virtualization is and know that VM is short for Virtual Machine. I also assume you probably have heard terms like hypervisor and bare metal. You probably have at least a basic understanding that server virtualization solutions from VMware (vSphere), Citrix (XenServer) and Microsoft (Hyper-V) allow you to convert hardware based servers into Virtual Machines all running on one physical server. If my assumption is incorrect the following links can help to get you familiar with the world of server virtualization.