校园数据网格建设的研究

Research on Construction of Data Grid of Campus

针对大学中所使用的集中式业务和数据处理应用系统的弊端,提出利用基于OGSA体系结构的网格开发工具GT4构建一个数据网格平台,将各种业务处理和数据存储分散到网格中不同的服务器上处理,平衡网格中各服务器的负载。详细描述了在各应用系统端部署GT4的核心组件WebService,将各应用系统封装为服务,实现各应用系统数据库、数据中心之间数据交互和联动。论述了在数据网格平台上建立UDDI中心和CA中心,利用UDDI中心实现服务统一描述、注册、发布和调用,利用CA中心颁发的数字证书进行用户身份和操作权限的验证,最后给出整个系统的体系结构。

Aiming at the abuse of centralized application systems in campus, the data grid platform based on OGSA is developed by the GT4, in which various kinds of operation and data process are distributed in different servers for balancing their loads. The procedure of deploying the web service in different severs is presented, by which each application system is encapsulated as service through the web service that is the core component of GT4. The exchange and cooperation is realized between databases of application systems and data center. The UDDI center and the CA center are deployed on the data grid platform. The UDDI center is responsible to unify the service of description, registration, release and invocation and the CA center is responsible to verify the user identity and authority by using the digital certificate released by the CA center. At last, the architecture of the data grid is described.