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提出一种面向可生存系统的自主应急恢复方法.研究了系统最优重启恢复的时间,确定了重启恢复的时间间隔参数;介绍了分层多级应急恢复的实现方式,依据重启对象的不同将恢复分成4个层次,并按层内分级的思想给出了重启次序优先级和重启次序链的建立方法;并对重启恢复实施过程进行了建模分析和构建了系统状态转换模型.仿真实验进一步分析了影响恢复总成本的参数约束,通过和传统周期性恢复方法比较,提出的方法在大大降低恢复成本的同时提高了系统的可生存性能.
This paper proposes a self-directed emergency recovery method for survivable systems, studies the optimal reboot recovery time of the system, and determines the parameters of reboot recovery time interval. The implementation of hierarchical emergency recovery is introduced, Recovery is divided into four levels, and according to the idea of hierarchical classification, the priority of restart sequence and the method of restarting the sequence chain are given, and the process of restarting recovery is modeled and the system state transition model is constructed. The simulation experiment further The parameter constraints that affect the total cost of recovery are analyzed. Compared with the traditional periodic recovery method, the proposed method can greatly reduce the recovery cost and improve the survivability of the system.