Java服务主动容错模型分析与评估

Java服务已成为支撑关键业务的业务服务，其可用性成为关键业务系统是否能持续提供服务的关键。采用主动容错技术可提高Java服务的可用性，建立Java服务的主动容错模型，便于分析和评估主动容错技术的有效性。通过模型分析与仿真实验的方法比较了采用Rejuvenation策略与不采用Rejuvenation策略的容错效果，通过分析评估得出，采用主动容错技术将有效改善Java服务的可用性，如果合理选择实施软件Rejuvenation策略的时间点，则可以取得更好的容错效果。

Analysis and evaluation on proactive fault-tolerance model of Java services

Java service has become real-world critical business service, and its availability is the key to the availability of business system based on Java technology. The availability of Java services can be improved when the technology of active fault-tolerance is applied. The model of active fault-tolerance facilitates the activities of analysis and evaluation. The effect of fault tolerance between with-Rejuvenation and without-Rejuvenation was discussed through model analysis and emulation experiments. The conclusion is the availability of Java services can be improved if the active fault-tolerant technology was adopted. If a reasonable time point of using software Rejuvenation strategy is chosen, the better fault tolerance effect will be achieved.