Grid services for distributed system integration

Increasingly, computing addresses collaboration, data sharing, and interaction modes that involve distributed resources, resulting in an increased focus on the interconnection of systems both within and across enterprises. These evolutionary pressures have led to the development of Grid technologies. The authors´ work focuses on the nature of the services that respond to protocol messages. Grid provides an extensible set of services that can be aggregated in various ways to meet the needs of virtual organizations, which themselves can be defined in part by the services they operate and share