远程容灾系统中失效检测器的设计与实现  

The design and implementation of a failure detector in a remote disaster-tolerant system

作　　者：何俊[1] 戴浩 谢永强 杨明[1] 黄鑫阳[1] 

机构地区：[1]解放军理工大学指挥自动化学院 [2]中国电子设备系统工程公司研究所,北京100039

出　　处：《兰州大学学报（自然科学版）》2007年第2期98-102,共5页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金重大资助项目(90304015).

摘　　要：设计了失效检测器可扩展的分级部署结构,采用检测与决策相分离的机制,保证了失效检测器易于部署在远程容灾系统中,能够满足不同应用的需求．提出了一种失效检测算法,综合考虑了消息延迟、丢失和时钟同步问题,能够适应网络状况和应用需求的变化．此失效检测算法已应用于某容灾系统中,测试结果表明该算法能有效降低误判率．Failure detector is one of the key components to implement in a remote disaster tolerant system. A flexible hierarchical architecture was designed so that the detection and decision-making were separately executed. In doing so, the failure detector can be applied to a remote disaster tolerant system and meet the requirements of different applications. An adaptable failure detection algorithm was put forward in consideration of message delay and message loss and clock synchronization. This algorithm can adapt itself to the change in network conditions and to the requirement of applications. The algorithm had been implemented in a remote disaster tolerant system and the test result showed that erroneous decision was greatly decreased using the algorithm.

关 键 词：失效检测 远程容灾系统 分级体系 概率统计模型 

分 类 号：TP183[自动化与计算机技术—控制理论与控制工程]