is a number of linked systems, working together closely ,so that they form a single computer
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The difference between distributed system and multiprocessor system is whether the processing units in the system share the main memory. If yes, then the system is multiprocessor system; otherwise, it's a distributed system.
A cluster system consists of multiple independent computers connected together, each with its own operating system and resources, while a multiprocessor system has multiple processors sharing the same memory and operating system. In a cluster system, each node operates independently and communicates through a network, whereas in a multiprocessor system, all processors share the same memory space and can access shared resources more efficiently. Clusters are typically used for high availability and scalability, while multiprocessor systems are designed for high performance and parallel processing tasks.
A clustered system combines multiple computers into a single system to perform computational task distributed across the cluster.
difference between operating system and system software?
In multiprocessor systems, failure of one processor will not halt the system, but only slow it down by sharing the work of failure system by other systems. This ability to continue providing service is proportional to the surviving hardware is called graceful degradation.