Design and Implementation of a P2P Resource Sharing System based on Metadata Catalog

How to achieve high efficiency of resource sharing and accessing is a hot and difficult point in the field of P2P. It is also a hot and difficult point in the entire distributed computing field. Resource sharing protocol design, user access control, user incentive strategy, common resource description and good scalability are the problems to deal with when sharing system is designed an implemented. This paper presents a metadata catalog-based resource sharing system called PTP. The system manages and query for resources through metadata catalog. And the users release and request resources through access proxy. Two stage authorization mechanisms based on roles are designed to for security control in the paper. In order to encourage users to contribute to the system, the service which the user can enjoyed is decided by his contribution to the system. Finally the system is tested in the internet simulated environment.