Hyper-V Comparison:Windows Server 2008 R2 vs Windows Server 2012

Processor and Memory Support    

Processor/Memory Feature

Windows Server 2008 R2

Windows Server 2012

Logical processors on hardware

64

320

Physical memory

1 TB

4 TB

Virtual processors per host

512

2,048

Virtual processors per virtual machine

4

Memory per virtual machine

64 GB

Active virtual machines

384

1,024

Maximum cluster nodes

16

Maximum cluster virtual machines

1,000

8,000

Network    

Network Feature

NIC Teaming

Yes, through partners

Yes, Windows NIC Teaming in box

VLAN Tagging

Yes

MAC spoofing protection

Yes, with R2 SP1

ARP spoofing protection

SR-IOV networking

No

Network QoS

Network metering

Network monitor modes

IPsec task offload

VM Trunk Mode

Storage    

Storage Feature

Live storage migration

No, quick storage migration through System Center Virtual Machine Manager

Yes, with no limits (as many as the hardware will allow)

Virtual machines on file storage

Yes, Server Message Block 3.0 (SMB3)

Guest Fibre Channel

Virtual disk format

VHD up to 2 TB

VHDX up to 64 TB

Virtual machine guest clustering

Yes, through iSCSI

Yes, through iSCSI, Fibre Channel, or Fibre Channel over

Ethernet (FCoE)

Native 4 KB disk support

Live virtual hard disk merge

No, offline

Live new parent

Secure offloaded data transfer

Manageability    

Manageability Feature

Hyper-V PowerShell

Network PowerShell

Storage PowerShell

REST APIs

SCONFIG

Enable/Disable shell

No, server core at operating system setup

VMConnect support for RemoteFX

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