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July 26, 2008 (KB950050)
R2 Service Pack 1 (KB976932) (standalone) / March 15, 2011; 19 months ago
Windows 8, Windows Server 2012, and Windows Server 2008 or standalone
Microsoft Hyper-V, codenamed Viridian and formerly known as Windows Server Virtualization, is a hypervisor-based virtualization system for x86-64 systems. 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.Hyper-V has since been released in a free stand-alone version, and has been upgraded to Release 2 (R2) status. It was updated in Windows Server 2012.
[hide] 1 Versions and variants
3 System requirements and specifications 3.1 Microsoft Hyper-V Server
4 Supported guests 4.1 Linux support
4.2 Windows Server 2012
5 VHD compatibility withVirtual Server 2005 and Virtual PC 2004/2007
6 Limitations 6.1 USB passthrough
6.3 Optical drives pass-through
6.4 Graphics issues on the host
6.5 Live migration
6.6 Degraded performance for Windows XP VMs
6.7 NIC teaming
6.8 No support for home editions of Windows
7 Windows Server 2012
8 See also
11 External links
 Versions andvariants
Hyper-V exists in two variants: as a stand-alone product called Microsoft Hyper-V Server 2008 (Hyper-V Server 2008 R2 for the second release), and as an installable role in Windows Server 2012, Windows Server 2008 R2, and Windows Server 2008 (the former containing the current release of Hyper-V).
The stand-alone version of Hyper-V is free, and was released on October 1, 2008. Itis a variant of the core installation of Windows Server 2008 that includes full Hyper-V functionality; other Windows Server 2008 roles are disabled, and there are limited Windows Services. The free Hyper-V Server 2008 variant is limited to a command line interface (CLI), where configuration of the "Host" or "Parent" (Hyper-V Server 2008) OS, physical hardware and software is done using shellcommands. A new menu driven CLI interface does simplify initial configuration considerably, and some freely downloadable script files extend this concept. Administration and configuration of the "Host" (Hyper-V Server 2008 OS) and the "guest" or virtual OSes is generally done by downloading extended Microsoft Management Consoles that are installed onto a Windows 7 PC or Windows 2008 Server (32 or64 bit) or System Center Virtual Machine.
Alternatively, another Windows Server 2008 or 2012 computer, with the Hyper-V role installed, can be used to manage Hyper-V Server 2008 by redirecting the management console. Other administration and configuration of Hyper-V Server 2008 can be done using a Remote Desktop RDP session (though still CLI) or redirected standard management consoles (MMC)such as "Computer Management" and "Group Policy (Local)" from a Windows Vista PC or a full installation of Windows Server 2008. This allows much easier "point and click" configuration, and monitoring of the Hyper-V Server 2008. Hyper-V Server Release 2 (R2) was made available in September 2009, its main feature being the inclusion of Windows Powershell v2 for greater CLI control, and the updatedWindows Server 2008 R2 code base.
Hyper-V implements isolation of virtual machines in terms of a partition. A partition is a logical unit of isolation, supported by the hypervisor, in which each guest operating system executes. A hypervisor instance has to have at least one parent partition, running a supported version of Windows Server...