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Grid Computing

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ALSO CALLED: Computational Grids, Cluster Computing, Grid Control
DEFINITION: Open Grid Services Architecture (OGSA) is a set of standards defining the way in which information is shared among diverse components of large, heterogeneous grid systems. In this context, a grid system is a scalable wide area network (WAN) that supports resource sharing and distribution. OGSA is a trademark of the Open Grid Forum.OGSA definitions and criteria apply to hardware, platforms and software  … 
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GRID COMPUTING DEFINITION (continued): …  in standards-based grid computing. The OGSA is, in effect, an extension and refinement of the service-oriented architecture (SOA). The OGSA addresses ongoing issues and challenges such as authentication, authorization, policy negotiation and enforcement, administration of service-level agreements, management of virtual organizations and customer data integration. For a Web service to be considered a grid service, it must allow clients to easily discover, update, modify and delete information about the service's state, define how the service evolves and ensure ongoing compatibility with other services. … 
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