Mechanism Of Grid Resource Discovery Based On Mobile Agents

As one kind of Computing Mode of Next Generational Internet, the key task of Grid aims at the management of a variety of software and hardware resource distributed across the internet wide-area based environment, which compose a uniform and virtual computing platform of shared resource. The resources discovery is a kernel of the grid technology.Therefore, how to discover the grid resources effectively and enable the application procedure to use these resources accurately and effectively becomes the research topic which the people cared about.This paper proposes a kind of grid resource discovery model which is compartmentalized into three layers including ordinary node layer, super node layer and directory node layer, in order to reduce network traffic and enhance communications efficiency. In this model, mobile Agent is used to carry on the interaction between two layers. On the super node layer and the directory node layer, LDAP directory servers acts as a unified interface of the grid information's storage and access, and the metadata of ontology's concept cluster is used to describe the node information in the leaf nodes of the LDAP directory server. Thus, by using the LDAP directory structure, the ontology is introduced arid a semantic grid of spatial information is constructed in order to enhance the intelligence of the grid resource discovery and obtain a better result. Then, it compares the model with the Globus Monitoring and Discovery Service completely, and draws a conclusion. At last, a simulative experimentation based on GridSim, which is a good simulation toolkit for grid resource management, has been done to verify the efficiency. The simulation has got a lot of better results.