【作者】 赵红；

【导师】 王凤先； 田俊峰；

【作者基本信息】 河北大学 ， 计算机应用， 2003， 硕士

【摘要】 随着计算机技术和网络技术的发展，分布式系统得到越来越广泛的应用。冗余服务因其在实用性和性能两方面的较大优势也已然成为分布计算的研究热点。本课题首先对现有分布式冗余服务系统所做的研究工作进行了分析，然后吸取它们在性能管理方面经验的同时，以面向对象的分布式冗余服务系统为背景系统，对其中的性能管理进行了较深入的研究，提出将移动代理技术引入负载平衡的设计思想，构造出一个基于移动代理的负载平衡模型—MMA。最后，在JAVA-JDK编程环境中对MMA模型进行了简单实现。 具体而言，本课题的研究工作主要包括以下几个方面： 1．对于在分布计算环境中，利用分布式对象技术建立的分布式冗余服务系统的总体框架进行介绍。 2．将移动代理技术引入，对面向对象的分布式冗余服务系统中的性能管理提出了一种新的解决思想，即构造出包括对象管理者、移动代理实体和服务代理三者在内的负载平衡互动模型MMA。通过这三者的相互配合，使得系统中的负载平衡从三个方面得以保证。 3．选用JAVA-JDK编程环境实现了MMA的原型系统。更多还原

【Abstract】 With the development of computer technology and network technology, the distributed system is already applied widely. By its ascendancy in two facets, practicability and performance, redundant service has been a researching focus in the field of distributed-computing. This paper firstly analyzes the jobs that have been done in the existing distributed redundant service systems. And then investigates the performance management of an object-oriented distributed redundant service system which is the background of this paper. At the same time, it presents a new load-balancing model based on mobile agent, which is introduced here in load-balancing management for the first time. That is MMA model. At last, it describes the simple realization of MMA model with JAVA-JDK.Specifically, the works have been done in this paper mainly includes three facets as following:1. Introduces the total frame of distributed redundant service system, which is built by use of distributed-object technology in distributed-computing environment.2. Presents a new method in load-balancing management of object-oriented distributed redundant service system that is making a model of MMA based on mobile agent. In this model, load-balancing is ensured by the cooperation of Object Manager, Mobile Agent and Server Agent.3. Implements the model system of MMA with JAVA-JDK.更多还原