基于Internet的信息网格的软件框架研究

为了实现数据信息在Internet上的广域共享和快捷获取,提出了一种信息网格的软件框架.参照计算网格的开放式网格服务构架,通过拓展信息搜集、监测、登记、发现、预订和搜索等服务,建立了面向Internet的信息网格的软件组件模型,研究了基于计算网格构建信息网格的方法.基于容错目的,提出了主、从层次的网格目录结构,研究了网格目录的复制和引用机制.为了实现网格信息的搜集与发现功能,设计了结点资源监测代理.通过提出网格信息登记协议和网格文件传输协议,实现了信息预订和信息搜索服务.使用JAVA技术开发了专门的Shell,以实现信息网格的服务接口.通过该接口,远程用户可以方便、灵活地使用信息网格提供的计算与信息服务,实现广域资源的单一访问入口.

Research of the Software Framework Based on Internet-Wide Information Grid

To share the wide-area distributed data and information resources interconnected with Internet, a software framework for the information grid is introduced. Referencing to the open grid service architecture of the computational grid and extending the services such as information collection, monitoring, register, discovering, booking and searching, a component model of the information grid software is presented. Based on the campus computational grid named WADE, a software method for information grid is also addressed. For the purpose of the fault-tolerance, a mast-slave meta-data catalog structure is proposed and the replication and reference mechanism of the catalog are explored too. In addition, a resource monitor agent is designed to discover and collect dynamical resources, and a grid information register protocol and a grid file transfer protocol are introduced for booking and searching the grid information. A service interface to the information grid is then implemented using a shell which is a version called GridShell developed by using JAVA techniques. With this shell, remote users can utilize the computing and the information services provided by the grid conveniently and flexibly and the wide-area resource is realized through a single assess portal.