Information Technology Reference
In-Depth Information
Virtual machines each run in their own child partitions. Child partitions do not have
direct access to hardware resources; instead, they have a virtual view of the resources,
which are called
virtual devices.
If you're running a hypervisor-aware operating system like Windows Server 2003,
Windows Server 2008, Windows Server 2008 R2, Windows Server 2012, or Windows
Server 2012 R2 in your virtual machine, any request to the virtual devices is redirected via
the high-speed bus to the devices in the parent partition, which will manage the requests.
By default, only Windows Server 2008 R2, Server 2012, and Server 2012 R2 are
hypervisor-aware operating systems. Once you install Hyper-V Integration Components on
an operating system other than Windows Server 2008 R2 and newer, it will be hypervisor-
aware. Microsoft provides a hypervisor adapter to make Linux hypervisor aware.
Non-hypervisor-aware operating systems (for example, Windows NT 4.0) use an
emulator to communicate with the Windows hypervisor, which is slower than molasses in
the winter.
Hyper-V Requirements
The following sections will describe the hardware and software requirements for install-
ing the Hyper-V server role. It is important to understand these requirements for obtaining
your software license as well as for planning for server hardware. When you understand
the requirements, you can design and configure a Hyper-V solution that will meet the needs
of your applications.
Hardware Requirements
In addition to the basic hardware requirements for Windows Server 2012 R2, there are
requirements for running the Hyper-V server role on your Windows server. They are listed
in Table 9.3.
Table 9.3
Hardware requirements for Hyper-V
Requirement Area
Definition
CPU
x64-compatible processor with Intel VT or AMD-V technology
enabled. Hardware Data Execution Prevention (DEP), specifically
Intel XD bit (execute disable bit) or AMD NX bit (no execute bit),
must be available and enabled. Minimum: 1.4GHz. Recommended:
2GHz or faster.
Memory
Minimum: 1GB RAM. Recommended: 2GB RAM or greater.
(Additional RAM is required for each running guest operating
system.) Maximum: 1TB.
Hard disk
Minimum: 8GB. Recommended: 20GB or greater. (Additional disk
space needed for each guest operating system.)
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