Combining Efficiency, Fidelity and Flexibility in Grid Information Services

Grid information service is an inherent component of a grid system which collects resource data and provides search functionality. In addition to efficiency, fidelity in discovering desired resources is also an important metric to evaluate the service quality. Recently, a number of grid information service systems have been proposed based on DHTs. However, these systems either achieve high fidelity at low efficiency, or achieve high efficiency at low fidelity. Moreover, some systems have limited flexibility by only providing exact-matching services or by describing a resource using a pre-defined list of attributes. This paper presents a grid information service, which offers high efficiency and fidelity without restricting resource expressiveness and meanwhile provides similar-matching service. Simulation results show that the proposed service outperforms other services in terms of efficiency, fidelity and flexibility.