Virtualization has already established itself as a mainstream technology with virtual servers eclipsing physical servers in both new shipments and installed workloads. Virtualization technology in the datacenter is helping facilitate a transition from simply consolidating existing servers to virtualization as a key infrastructure technology and enabler of clouds of all types, including internal, external, private, public, and hybrid clouds. The road map to cloud — which will enable IT to be offered as a service — requires a trek through broad virtualization adoption and deployment throughout the datacenter first. Virtualization in the datacenter has been a catalyst for datacenter transformation, bringing beneficial dynamic features that have been extremely disruptive. As server virtualization has proliferated, there has been a corresponding effect on storage, networking, management, and security spending, as virtualization fundamentally changes the approach to these technologies. These areas are reinventing themselves in light of server virtualization, enabling IT departments to take a holistic approach to virtualization, spanning servers, networks, and storage to virtualize demanding and business-critical tier 1 applications.