The Spatial Data Sharing Mechanisms of Geological Survey Information Grid in P2P Mixed Network Systems Network Architecture Model

The spatial data sharing mechanisms is important in the technical infrastructure of cloud computing or GRID computing, Many researchers have focused on the centralized resource pool and global-local two-layer model but little work considers the availability and practicability of universal discovery description and integration and mechanisms of supporting long transaction management. In this paper, we propose an effective ways of resource organization and mechanisms of management in P2P mixed network systems network architecture model, Called RA-P2P. The variety of spatial data that is of large storage capacity and of different data format and spatial services which are various and powerful are collected and put together, therefore it needs an effective mechanism to store, manage, retrieve and discover these geo-resources. Based on the platform of GSI-Grid RA-P2P adopts a means of metadata modeling to establish resource catalogue, provides many kinds of catalogue services conforming to OpenGIS Catalogue Services Specification and constitutes Catalogue Services Aggregator (CSA) which is a unified storage container for catalogue services to realize registration, issuance and discovery of services. Heterogeneous distributed grid computing environment gives an effective solution to manage geo-resources metadata, supports aggregation and integration of these resources and meets the needs for distributive storage and integrative discovery of multi-level, multi-source, multi-type spatial information. Based on Composition and technical infrastructure of the RA-P2P, the frame of resource organization based on geological fields Ontology, share, synchronous and teamwork mechanism of global-local two-layer resource, temporary aggregate-ware of data resource for supporting long transaction mechanism, the portal configurator of virtual node resource for node self-government mechanisms have been discussed in the paper.