SIG中基于资源代理技术的数据管理

Broker-based Data Manage Model in Spatial Information Grid

由于空间数据类型、管理机构的多样性,以及构建数据服务系统的历史渐进性,不同空间数据网格平台之间的数据互操作能力难以提高.基于代理的数据管理模型,可以在最大程度地保护数据源独立运行性的前提下,屏蔽复杂数据系统间的异构特征.文中探讨利用存储资源代理技术(storage resource broker,SRB),实现异构数据平台之间一体化的数据检索和访问.描述了空间信息网格(spatial information grid,SIG)环境中,基于SRB的异构数据网格互操作接口设计和信息通信流程,并对实验结果进行了分析.

Most of the space agencies have built Grid systems to manage large volumes of spatial data archives and products. However, the heterogeneous data structure, the distributed storage location, and the gradual progress of building data service systems, made such spatial grid systems to be grid islands. The broker-based manage model can hide complexity and heterogeneity of spatial data sources, and promote inter-Grid collaboration for earth observation applications. This paper discusses the special problems of spatial information integration and some features of broker-based data management model. We demonstrate the prototype of building broker-based model to integrate heterogeneous data grid. The paper also describe our experiences of case study on seamless integration with Purdue TeraGrid Data by using Storage Resource Broker, which is based on the extensible data service interfaces of China Spatial Information Grid.