the concurrent application of the processing and data storage resources of many computers in a network to a single problem. It also can be used for load balancing as well as high availability by employing multiple computers—typically personal computers and workstations—that are remote from one another, multiple data storage devices, and redundant network connections. Grid computing requires the use of parallel processing software that can divide a program among as many as several thousand computers and restructure the results into a single solution of the problem. Primarily for security reasons, grid computing is typically restricted to multiple computers within the same enterprise.

Grid computing evolved from the parallel processing systems of the 1970s, the large-scale cluster computing systems of the 1980s, and the distributed processing systems of the 1990s, and is often referred to by these names. Grid computing can make a more cost-effective use of computer resources, can be applied to solve problems that require large amounts of computing power, and may be the forerunner of pervasive computing—computer applications that pervade our environment without our being aware of their presence.

See A. S. Tanenbaum and M. van Steen, Distributed Systems (2001); F. Berman, G. Fox, and A. J. G. Hey, Grid Computing (2003); A. Abbas, Grid Computing (2003).

The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

-20146-