集群服务器技术综述

介绍了集群服务器技术的现状和近期发展。通过对集群技术的需求，可用性等级级别、集群技术的优势，系统构造方式的论述，以及镜象，无共享，全共享三种数据共享方式的重点讨论，分析了集群技术的特点和实现方法，提出了集群技术中本地切换，应用程序与高可用软件的紧密耦合，避免服务中断，异种服务器互备份等最新发展动向，和加强集群技术研究，发展高可用软件的重要意义。

Overview of Cluster Server Technology

The current situation and the recent developments of cluster technology is briefly introduced. The requirement for cluster technology, the grade of availability, the advantage of cluster technology, the system structure model is introduced, the data share models that include mirrored disks, non -shared disks, shared disks are emphatically discussed, and the characteristics and implement methods of cluster technology are analyze. The new trend of developing cluster technologies such as the local switching, tight -coupled applications between application program and high -available software, avoiding services interrupting, and backing up each other in heterogeneous severs is presented, the importance of studying cluster technology and developing the high availability software is indicated