What is Hyper-v | Windows Server Virtualization | Server 2012 R2 | Hypervisor

Hyper-V is known as Microsoft Windows Server Virtualization which enables you to create a virtualized server computing environment. It can create multiple virtual machines  on x86-64 systems which call Guest machine. Hyper-V runs multiple operating systems including Windows, Linux, and others, in parallel, on a single server. A beta version of Hyper-V was shipped with certain x86-64 editions of Windows Server 2008, and a finalized version (automatically updated through Windows Update) was released on June 26, 2008.

Hypervisor - A hypervisor is a hardware virtualization technique that allows multiple guest operating systems (OS) to run on a single host system at the same time. The guest OS shares the hardware of the host computer, such that each OS appears to have its own processor, memory and other hardware resources.

A hypervisor is also known as a virtual machine manager (VMM) include in Microsoft SCCM Server 2012.

A free stand-alone version of Hyper-V is also provided by Microsoft in Server R2 release, Hyper-v Server 2012. For download the free Hyper-V server 2012 R2 from here -http://www.microsoft.com/en-us/evalcenter/evaluate-hyper-v-server-2012-r2

The stand-alone Hyper-V Server variant does not require an existing installation of Windows Server 2008 or Windows Server 2012 nor any R2 version. The standalone installation is called Microsoft Hyper-V Server, It's basically a core installation of server which only include Hyper-V feature.

Minimum System Requirements for Hyper-V in Server 2008 and 2012.

Processor - An x86-64 processor (Intel VT or AMD Virtualization)

RAM - Minimum 1GB, Recommended 2GB, Maximum 1TB. (Each virtual machine requires its own memory) Host Windows Server 2008 R2 support up to 32GB for Standard, 2TB for Enterprises and Datacenter Host Windows Server 2012 supported maximum of 4TB RAM

Guest Machine

Hyper-V in Server 2008 and 2008 R2 supports virtual machines with up to 4 processors each.

Hyper-V in Windows Server 2012 supports virtual machines with up to 64 processors each.

Hyper-V in Server 2008 and 2008 R2 supports up to 384 VMs per system.

Hyper-V in Windows Server 2012 supports up to 1024 active virtual machines per system.

Supported Guest Operating System in Server 2008 Hyper-V

Guest OS              

Virtual processors


CPU architecture

Windows Server 2012


Enterprise, Datacenter


Windows Home Server 2011

1, 2 or 4



Windows Server 2008 R2 SP1


Web, Standard, Enterprise, Datacenter


Windows Server 2008 SP2


Web, HPC, Standard, Enterprise, Datacenter

IA-32, x64

Click Here To Read More About Supported Guest Operating System

Note:- Windows Server 2012 can run as a guest machine only on windows server 2008 R2 RTM or SP1

Supported Windows Guest Operating System in Server 2012 R2 and Windows 8.1 Hyper-V

Windows server 2012 supported Guest Operating System Windows as well Linux also.

Guest OS

Max. Virtual Processors


CPU Arch.

Windows Server 2012 R2



Windows Server 2012



Windows Server 2008 R2 & SP1


Web, Standard, Enterprise, Datacenter


Windows Server 2008 SP2


Web, Standard, Enterprise, Datacenter

X86, x64

Click Here To Read More About Supported Guest Operating System

New Features added in Hyper-V in Windows Server 2012

Windows Server 2012 introduced many new features in Hyper-V

  • Hyper-V Extensible Virtual Switch

  • Network virtualization

  • Multi-tenancy

  • Storage Resource Pools

  • .vhdx disk format supporting virtual hard disks as large as 64 TB, with power failure resiliency

  • Virtual Fibre Channel

  • Offloaded data transfer

  • Hyper-V replica

  • Cross-premise connectivity

  • Cloud backup

Additional information


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