【作者】 刘艳；

【导师】 郭连骐；

【作者基本信息】 哈尔滨工程大学 ， 通信与信息系统， 2003， 硕士

【摘要】 分布式系统比单机系统具有更高的性能和可靠性，并且随着互联网的普及和某些应用本身所具有的分布式特性，使其应用日益广泛。但是，对于网络分布式系统来说，当系统的任务量过重时，单机处理速度的瓶颈、网络拥塞和延迟、负载分布的不均衡，使分布式系统达不到预期的性能要求，因此进一步提高分布式系统的性能是一个急待解决的问题。 本文结合了分布式系统和并行系统的优点，将单机结点的分布式系统改造为网络并行计算结点的分布式系统，并首次应用于海军综合电子系统的重要组成部分——水面舰载指控系统中，由于网络并行计算结点的处理速度高于单机结点，从而提高了整个分布式系统的处理速度。同时，本文还深入分析了基于网络的并行计算系统程序设计方法，对本课题所研究的舰载指控系统原有的分布式体系结构按照并行化的思想进行了优化；提出了一种适合目前海军舰载指控系统作战要求的分布式网络并行体系结构；讨论了这种体系结构的可行性和性能优势。另外，本文根据前面提出的分布式网络并行舰载指控系统体系结构的特点，通过研究目前各种并行系统负载平衡算法，提出一种适合于这种网络并行分布式体系结构的负载平衡解决方案，即基于优先级的任务请求动态负载平衡，使系统的稳定性和可靠性得到了一定的提高。 本文所提出的分布式网络并行体系结构和适应于这种体系结构的负载平衡方法在舰载指控系统仿真平台上做了仿真试验，证明这种方法的应用使舰载指控系统在性能上比原有的分布式系统有所提高，从而验证了本文所提出的方法具有一定的实用价值。更多还原

【Abstract】 Distributed system has higher performance and reliability than the single computer system, and has beening used wider and wider with the all-pervading of Internet and distributed characteristics of some applications. But for the distributed system, when the system is overloaded, the distributed system can not meet the performance requirements anticipated because of the bottleneck of the speed of monolithic processor, network congestion and delay and unbalanced partition of load, consequently to improve the performance of the distributed system ulteriorly is an imperative problem.This thesis combines the merits of distributed system and those of parallel system, and the monolithic processor conjunction distributed system is changed into networked parallel computing conjunction distributed system, which is applied in important component of navy integrated electronic system for the first time-surface vessel command and control system . On account of the handling speed of networked parallel computing conjunction is higher than that of monolithic processor conjunction, so the handling speed of whole distributed system is improved. At the same time, this thesis has analyzed the programming method of parallel computing system based on network and optimized the original distributed architecture of surface vessel command and control system which is studied in this thesis according to parallelism , and provided a distributed network parallel architecture which is adapt to operational requirements of actual navy surface vessel command and control system, and discussed the feasibility and performance predominance of this kind of architecture. In addition, this thesis provides a kind of load balance resolution scheme which is adapt to the networked parallel distributed architecture according to the characteristics of the architecture of distributed networked parallel surface vessel command and control system and studying actual all kinds of parallel system load balance algorithms, that is to demand dynamic load balance on the basis of prior mission and to makethe stability and reliability of the system to be improved.The distributed networked parallel architecture and load balance resolution scheme which is adapt to this kind of architecture have been simulated on the surface vessel command and control system artificial platform, and the experiment shows that the performance of the surface vessel command and control system is higher than that of the original distributed system by making use of this kind of method and proves that the method discussed in this thesis has some practical value.更多还原