Abstract: The computer information system can provide farthest business continuity service from the remote application layer disaster recovery system(RALDRS), how to construct this system is an important problem in the computer information system area. This paper analyzes the RALDRS basic theory and system structure model, and researches this system’s design and realization

Key words: DR system; Disaster backup; Synchronous copy; Asynchronous copy

摘要： 应用级容灾系统能够在灾难中最大限度地保障计算机信息系统提供正常的服务，如何构建远程应用级容灾系统是计算机信息系统中的重要课题。详细分析了应用级容灾系统的基础理论，剖析了容灾系统的系统结构模型，容灾系统的具体实施模型，对远程应用级容灾系统设计与实现进行了详细的研究。

关键词: 容灾系统；容灾备份；同步复制；异步复制