关键词: 远程镜像 同步模式 日志 数据缓存

Abstract:

Remote mirroring has become increasingly important as organizations, and businesses depend more and more on digital infomation. Balancing the data ava  ilability, access performance and the cost of development and maintenance is essential for designing remote mirroring systems. This paper first presents   the design goal, related metrics and the methodology of remote mirroring systems. Then, we classify these systems from different viewpoints and discuss their implementation strategies, methods and prindples. Finally, the related research and development status quo is introduced.

Key words: （remote mirroring, synchronous mode, log, buffer）