When entire operating systems cannot run in the virtual machine, but some or many applications can, it is known as
Partial Virtualization. Basically, it partially simulates the physical hardware of a system.
This type of virtualization is far easier to execute than full virtualization. This is very successful when computer
resources are shared among-st multiple users.
Situations that need backward compatibility or portability require full virtualization. Here partial virtualization falls woefully
short. This is because it is difficult to anticipate which features have been used by a particular application.
Partial virtualization was used in the first-generation, time sharing system, the CTSS. This was a historical milestone
since it paved the way to full virtualization.
Address space virtualization is a key form of partial virtualization. Here, each virtual machine consists of an independent
address space. This needs address relocation hardware, and is present in the most practical examples of partial
virtualization.
Running the whole operating system in the virtual machine can be difficult for a few applications thus the process of partial virtualization opts. It is one of those types of virtualization that is easier to execute. Moreover, it is highly successful when computer resources are shared among other website users.
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