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Difference Between Multiprocessor and Multicomputer
Both multiprocessors and multicomputers are the types of parallel computing systems. The basic difference between a multiprocessor and a multicomputer is that a multiprocessor is a single computer system containing multiple processors interconnected with the common I/O and memory devices, whereas a multicomputer is a system consists of several autonomous computers connected in a network and each computer has its own I/O and memory devices, and other computing resources.
Read through this article to find out more about multiprocessors and multicomputers and how they are different from each other.
What is Multiprocessor?
A multiprocessor is a data processing system that can execute multiple programs simultaneously. It is also known as a multiprocessing system. Multiprocessors use several processing units that allow multiple threads to be used for a single procedure.
A multiprocessor employs a distributed approach. In this approach, a single processor does not perform a complete task, instead, more than one processor is used to perform the subtasks. A multiprocessor helps in improving the cost and performance ratio of the computing system. It also helps in improving the authenticity of the system by dividing a task among modules.
What is Multicomputer?
A multicomputer is a system consists of several individual computers connected in a network and each individual computer has its own computing resources such as I/O and memory devices. In a multicomputer, the computers execute the streams of separate instructions and have their own memory. These computers cannot access the memories of other computers in the network.
An example of a multicomputer system is the NORMA (No Remote Memory Access) model. In this model, multiple computers having their own memory, processor and I/O devices are connected in a network and communicate together by passing messages rather than making direct communication.
Difference between Multiprocessor and Multicomputer
The following table shows the important differences between a multiprocessor and a multicomputer −
| Multiprocessor | Multicomputer |
|---|---|
| Multiprocessor consists of multiple processors within a single computer. | Multicomputer is an interlinked multiple autonomous computer. |
| Multiprocessor is a singly shared memory that is attached to the elements being processed. | The memory attached to the processing elements are distributed in multiples. |
| Multiprocessor is necessary for the processing elements to communicate with each other. | Multicomputer is not required for elements being processed to communicate. |
| Multiprocessor is a dynamic network. | Multicomputer is a type of static network. |
| Example of multiprocessor is a sequent symmetry S-81. | Example of a multicomputer is a message passing multicomputer. |
Conclusion
The most significant difference between a multiprocessor and a multicomputer is that a multiprocessor is a single computer with many processors, while a multicomputer is an interconnected system of multiple autonomous computers.
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