MDS-BASED GEO-SPATIAL METADATA FRAMEWORK*

MDS (Monitoring and Discovery Service) is a key infrastructure in grid computing, it mainly undertake registry, updating and discovery of all sorts of resource information in the grid environment. The information organized and released by the MDS is the descriptive information of diversified resources (net resources, computing resources, data resources etc), including data, services and entities of the grid environment, MDS can provide a veracious and real-time vies of dynamic resources in the grid. This paper developed a MDS-based framework for coping with the problem of distributed geo-spatial metadata, the framework is called GridMeta. First, we introduced the organization of GridMeta Servers; then we put forward a information model based on DIT, according to this information model, geo-spatial metadata, service metadata, user metadata and all kinds of network (grid) resource information can be depicted and stored identically; and the last, we provide a set of accessing interfaces of GridMeta API, by employment of these interfaces, the registering, adding, deleting, updating and (automatic) discovery of distributed metadata can be implemented