Windows Server 2008 R2 Datacenter is optimized for large-scale virtualization on small to large server systems & for workloads that require high levels of scalability, reliability, & availability to support large, mission-critical applications. With unlimited virtualization use rights & a hypervisor-based virtualization technology, Windows Server 2008 R2 Datacenter provides the flexibility & cost savings to easily run large numbers of virtualized Windows Server instances. Server virtualization technology lets you optimize system utilization & resources & realize significant infrastructure & management cost savings. Windows Server 2008 R2 Datacenter provides an ideal platform for enterprise-scale virtualization. Windows Server 2008 R2 Datacenter features Hyper-V, a flexible high-performance hypervisor-based virtualization technology