Abstract:

Resource discovery is a relatively important method in grid. Along with the development of grid technology，the increase of the number of resources, it is a problem we must resolve that how to accurately and efficiently discover resources to meet the users’ need. This paper briefly analyzes two existing models of grid resource discovery to solve the existing problems,advances a mutilevel model based on mobile agents to discover grid resources, uses the DHT cache and route technology to cover networks, adopts the LDAP directory service and mobile agents to transmit information，and describes the resources by ontology based on Web semantics. The overall framework and working mechanism are  introduced in detail and an evaluation is given.

Key words: grid;resource discovery;DHT;LDAP;mobile agent;ontology