Abstract: The resource discovery problem is to find the addresses of matching resources by the given description of resources. How to find the needed resources quickly and accurately from the distributed stored resources is a challenge.Traditional grid resource discovery system adopts registry and index, but these methods cannot satisfy the need of increasing scale of grid system. P2P system is a scalable distributed system. It's an efficient method to solve the grid resource discovery problem by adopting current P2P technology. This paper introduced resource discovery in grid system,resource discovery in P2P system,grid resource discovery system based on P2P and gave comparisons.

Key words: Resource discovery,Grid, Registry,Index,P2P