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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。
Introduced the current situation and recent development of cluster server technology. Through the requirements of cluster technology, the level of availability, the advantages of cluster technology, the discussion of system construction mode, and the three kinds of data sharing modes, such as mirroring, no sharing and total sharing, are discussed emphatically. Analyzed the characteristics of cluster technology and its implementation. It puts forward the latest development tendency of local switching in cluster technology, the close coupling between application program and high availability software, avoiding the interruption of services and the mutual backup of heterogeneous servers. It is also of great importance to strengthen cluster technology research and develop high availability software.