构建分布式系统的关键技术研究与实现

发布时间：2018-11-23 18:02

【摘要】：集群计算以及近年来涌现出的物联网、云计算和无线传感网络等概念均为分布式系统技术的商业应用,因此构建分布式系统是有效实现这些应用的基本要求。本文主要研究了分布式系统的通信和负载均衡问题。在简单介绍了分布式系统及其构建的主要技术后,叙述了分布式系统的研究现状。通信是分布式系统的主要技术之一。本文结合远程过程调用模型,构建了节点信息库;针对应用的透明性,设计了进程通信的两个基本函数Reader和Writer,并采用java语言编程实现;以矩阵计算为实例,在两个节点、三个节点和四个节点组成的系统中分别对这两个函数的功能和性能进行了测试,实验结果表明利用Reader和Writer通信函数是有效的。本文对分布式系统的负载均衡算法进行了研究。在分析了目前常用的负载平衡算法后,建立了一种半分布半集中式动态负载分配模型,并据此设计了相应算法;根据节点响应时间,对模型进行了性能分析,并与原有的动态分配算法进行了比较。讨论结果表明,新模型提高了分布式系统的资源利用率。设计具有应用透明的通信函数,研究系统的负载均衡是构建性能良好的分布式系统的基本要求,本文的工作试图为建立分布式系统原型建立基础。
[Abstract]:Cluster computing and the concepts of Internet of things cloud computing and wireless sensor network are all commercial applications of distributed system technology. Therefore building distributed system is the basic requirement to realize these applications effectively. In this paper, the problem of communication and load balancing in distributed systems is studied. After introducing the main technology of distributed system and its construction, the research status of distributed system is described. Communication is one of the main technologies of distributed system. In this paper, the node information base is constructed based on the remote procedure call model, and the two basic functions of process communication, Reader and Writer, are designed and implemented by java language, aiming at the transparency of the application. The function and performance of the two functions are tested in a system composed of two nodes, three nodes and four nodes. The experimental results show that the use of Reader and Writer communication functions is effective. In this paper, the load balancing algorithm of distributed system is studied. After analyzing the commonly used load balancing algorithms, a semi-distributed and semi-centralized dynamic load distribution model is established, and the corresponding algorithm is designed accordingly. According to the response time of the node, the performance of the model is analyzed and compared with the original dynamic assignment algorithm. The results show that the new model improves the resource utilization of distributed systems. The design has the transparent communication function, the research system load balancing is the basic requirement of constructing the distributed system with good performance. The work of this paper attempts to establish the foundation for the establishment of the distributed system prototype.
【学位授予单位】：南京邮电大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TP338.8

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