双机冷备计算机信号切换的设计与实现

Design and Implementation of the Signal Switching of Double Cold Standby Computer System

双机冗余冷备份是提高计算机系统可靠性的冗余设计方式之一,而信号切换作为双机冗余冷备份计算机系统实现的关键功能,承担着两套互为冷备的计算机I/O接口的正确、可靠的选择与切换,是影响整个系统可靠性的重要环节。本文介绍了一种信号切换模块的设计原理和实现方法,该信号切换模块已经实际使用验证,性能和可靠性满足预期目标。

Double redundant cold standby is one of the redundant design ways to improve the reliability of computer system, and as a key function of implementing the double redundant cold standby computer system, signal switching bears the tasks of correctly and reliably choosing and switching the I/O interface of two sets of cold standby computers, so it is an important part of the reliability of overall system. This paper presents the design principle and implementation method of a signal switching module. The module has been verified through actual use, and its performance and reliability are in accordance with the expectation targets.