Microsoft’s Windows Server 2012 R2 Datacenter :

– The Windows Server 2012 Datacenter from Microsoft is designed for highly virtualized private & hybrid cloud environments and features full Windows Server functionality with unlimited virtual instances. Windows Server 2012 delivers a highly dynamic, available and cost-effective server platform for your datacenter and your private cloud. It offers businesses and hosting providers a scalable, dynamic and multitenant-aware cloud infrastructure that connects more securely across premises and allows IT to respond to business needs faster and more efficiently.

• Group Policy Efficiency: Enhance startup speed for offline machines using the “Policy Cache” setting. Domain-joined devices can store policy settings locally, potentially bypassing download delays.
• Full System Restore for Clients: Now facilitated by Windows Deployment Services (WDS).
• Automated Storage Prioritization: Storage Spaces allocate fastest physical media for frequently accessed files.
• Precise IP Control (IPAM): Manage user access to DHCP configurations, IP address blocks, etc. IPAM integrates with System Center Virtual Machine Manager 2012 R2 for coordinated IP policies across both physical and virtual environments.
• Accelerated VM Deployment (about 50% faster): Generation 2 VMs no longer need Legacy Network Adapter; SCSI controller outperforms legacy IDE controller.