Windows Server 2008’s ‘Virtualization’ Terminology
The idea of Virtualization is to emulate, or host, an entire computer environment within the operating system of another computer. Here are some related terms:
WSv (Windows Server Virtualization) The whole concept of virtualization on Windows Server 2008.
Hyper-V (Code name Viridian). Means very nearly the same thing as WSv. Perhaps the difference is this, Hyper-V is the name of the actual technology that you install with the Server Manager, Add Roles wizard. Whereas WSv is an umbrella for everything to do with 2008 virtualization.
Host or Host operating system. The first or underlying operating system, namely Windows Server 2008 with the Hyper-V role added.
Guest or Child guest operating system. This would be one of your virtual servers, for example, a virtual machine performing the role of a domain controller, or an email server. Crucial concept: the child does not have its own hardware separate from the parent.
Hypervisor. A clever layer that isolates the parent and child partitions from the physical hardware on the host computer.
.VHD is a huge physical file that holds all the disk data for the child operating system. Never miss the chance to collect a free .VHD download from on of Microsoft’s sites. (You will still need a licence!).