There are two types of virtual machines: system and process. System machines mimic a real computer and allow for multiple operating systems and hardware configurations. Process machines run a single program in isolation from the physical computer’s operating system.
There are two main types of virtual machines. One, called a system virtual machine, is used to mimic all the processes and components of a real computer. The other, known as a process virtual machine, is used to run only a single application and disappears when the application is closed.
System virtual machines allow a person to use a single server as if it were many different computers. Using this type of technology, a machine can be reconfigured in a number of ways. Each of these reconfigurations is completely isolated from other systems and can act as an independent computer, even though they each exist on the same physical machine. This isolation means that if one system crashes, the other virtual machines can still be used.
Using system machines also allows a user to run multiple operating systems on the same machine. This allows a user to run programs that are only available on one type of operating system. It also allows you to test a program on multiple platforms without switching machines.
Depending on the user’s needs, system machines can be configured to function as if they have a variety of different types of hardware. Inside every machine is a virtual motherboard, virtual processor, virtual video graphics accelerator card, and all of the other components found inside a physical computer. The virtual computer can also be configured to use the hardware on the physical system as if it were made to a different specification. There are as many different configurations of system virtual machines as there are server configurations of physical computers.
Process virtual machines are used to run a single program in isolation from the physical computer’s operating system. This allows a user to run a program that might otherwise be incompatible with the normal operating system. Each process machine is created to run a specific program and exists only while the program is running. Closing the running program will make a process machine disappear and opening the program again will create a new virtual machine.
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