Abstract:

In order to solve the problems existing in the current grid resource discovery methods,a new grid resource discovery model based on the hierarchical architecture and the tree overlay network is proposed.In this model,the grid is logically divided into two layers： the lower one consisting of common grid nodes with various grid resources and services,and the upper one as a reliable tree overlay network consisting of grid information nodes,which takes charge of the organization,management and resource discovery of information nodes.By using the hierar-chical approach,the scalability of large-scale grid resource discovery is improved.By adopting reliable tree overlay networks,the efficiency of resource discovery is raised.Besides,by introducing a parallel mode,a rapid resource searching is implemented.Thus,the update and maintenance of resource information is effectively guaranteed by organizing the grid information nodes in an absolute distributed manner.Experimental results reveal that the proposed model is effective.

Key words: grid, resource discovery, overlay network, hierarchical architecture