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双机热备是计算机应用系统稳定、可靠、有效、持续运行的重要保证,本文介绍一种高可靠性的双机热备份机制的设计与实现.“,”The design and the implementation of duplicate hot standby composed of a host computer and a standby computer is presented. A mechanism of the duplicate hot standby is used to make computer system operate in a stable, reliable, efficient and continuous way.