The Research On Key Technologies And Design Of Campus Data Grid

A data grid is a grid computing system that deals with data—the controlled sharing and management of large amounts of distributed data. Technology of Data Grid is a research hot. Metadata and replica management are crucial aspect. There are great deals of information isolated island, many resources and information can't get valid utilization and share in the campus network environment.To investigate on technology of metadata and replica management in Data Grid, designs Campus Data Grid to resolve the problem within environment of the campus network. This paper carries on a research from several followings:1. Metadata management: To analyze features of some related model of metadata management. On the basis of research a kind of local autonomy, distributed and three layers model of metadata management is suggested.2. Replica creation strategy: To analyze some related works on the replica creation strategy. Caching plus best client replica creation strategy for Campus Data Grid environment is suggested. Between of local autonomy adopts caching strategy. Inside of local autonomy adopts best client strategy.3. Replica location and selection mechanism: To analyze some related works on the replica location and selection mechanism. Mechanism for Campus Data Grid environment is selected. Replica catalog is used to implement replica location. Replica catalog storage mapping of logical file to physical file that implements the location. Replica selection adopts simple and efficient IBL algorithm.4. Replica consistency management: To analyze some related replica consistency management strategy. Replica consistency management strategy for metadata model of this paper is suggested.On basis of investigating on key technology of Data Grid, this paper designs Campus Data Grid system with production of research and realizes primary system model.