校园网格系统中资源信息服务的实现

资源信息服务是网格系统实现中的核心和基础部分之一,提供各种分布式网格资源的静态和动态信息.根据面向对象的思想,对校园网格系统中的资源节点采用层次化管理的办法.通过对资源的抽象,将所有的资源信息存储在树中.采用两级移动代理的策略监测校园网格系统中网格节点的动态改变,包括网格节点的加入和退出,节点资源信息的改变.通过定时更新树的操作来保证信息树中所存储的资源信息总是最新的.对树的操作简单易实现,当校园网格系统中的资源节点不是很多时,这种方法能高效地完成资源信息服务的实现.

Realization of Resource Information Service in the Campus Grid System

Resource information service is one of the kernel components of grid system and it provides to us static and dynamic information of distributed grid resources. According to the thought of object_oriented, a hierarchical model for the resource node is proposed in the campus grid system. All the information of the resource is stored in a tree by the abstraction of resource. A two_layer mobile agent is used in the grid system to monitor the change of the status of the grid node,including the node login and logout as well as the change of the node status.The information tree is updated every a fixed interval, so the resource information stored in the tree is always newly. All the operations on the information tree can be imple mented easily, so the method using an information tree can effectively implement the information service when the resource nodes aren't so much in the campus grid system.