In the area of large scale systems the fifth

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Unformatted text preview: are mainly used for storing programs and data that are only read (not written/modified). In the area of large-scale systems, the fifth-generation period saw the emergence of more powerful supercomputers based on parallel processing technology. That is, the same multiprocessing concept of fourth generation was used to build shared memory and distributed memory parallel computers. In a shared memory parallel computer, a number of processors are connected to a common main memory by a high-speed bus or communication network, whereas in a distributed memory parallel computer, a number of processors, each with its own memory, are interconnected by a communication network. Parallel programming technique is used in these systems to break a problem into smaller problems and execute them parallely on the multiple processors of the system. While working on a problem, the various processors of a shared memory parallel computer use memory access mechanism for communication, whereas the various processors of a distributed memory parallel computer use message passing mechanism for communication. Distributed memory parallel computers have better scalability (can grow larger in capability) than shared memory parallel computers, and are now also built by clustering together powerful commodity workstations by using a high-speed commodity switched network. This is also known as clustering technology. During the fifth-generation period there was tremendous outgrowth of computer networks. Communication technologies became faster day-by-day and more and more computers got networked together. This trend resulted in the emergence and popularity of the Internet and associated technologies and applications. The Internet made it possible for computer users sitting across the globe to communicate with each other within minutes by the use of electronic mail (known as e-mail) facility. A vast ocean of information became readily available to the computer users through the World Wide Web (known as WWW). And several new types of exciting applications li...
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This document was uploaded on 04/07/2014.

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