A virtual private server (VPS) or Virtual Dedicated Server (VDS) is a method of splitting a server. Each virtual server can run its own full-fledged operating system, and each server can be independently rebooted.The practice of partitioning a single server so that it appears as multiple servers has long been common practice in mainframe computers, but has seen a resurgence lately with the development of virtualization software and technologies for other architectures.A growing number of companies offer virtual private server hosting, or virtual dedicated server hosting as an extension for web hosting services. Some web hosting companies call a Virtual Private Server a Virtual Dedicated Server/Dynamic Dedicated Server or the other way around