中文版 | English
CSpace  > 北斗导航工程中心
Modeling and Evaluation of Mixed Redundancy Strategy with Instant Switching in Cloud-Based Systems
He, Pan; Tan, Chun; Zhao, Xueliang; Zheng, Zhihao
2015
摘要Mixed redundancy strategy is generally used in cloud-based systems, with different node switch mechanism from traditional mixed strategy. However, related researches often concentrates on traditional mixed redundancy strategy in which cold standby components is working only after all active nodes fail. So a model is developed to evaluate the reliability and performance of cloud-based degraded system subjected to mixed active and cold standby redundancy strategy with continual monitoring and detection mechanism. It is assumed that the node switching process is triggered once some active nodes fail and there are available standby nodes. A continuous-time Markov chain is built on top of the state transition process and both transient and steady state availability and expected job completion rate are used to evaluate system metrics with or with repair facilities. A numerical method is used to solve the model and sensitivity analysis is conducted on different redundancy strategy. Illustrative examples using real-world data were presented to explain the process of calculating the probability of each state and the different kinds of availability and performance. The comparison with traditional mixed redundancy strategy proved that the system behavior was different using different kinds of mixed strategy and the analysis model for traditional strategy was not suitable for strategies in cloud-bases system.
语种英语
会议(录)名称2015 IEEE 9TH INTERNATIONAL SYMPOSIUM ON THE MAINTENANCE AND EVOLUTION OF SERVICE-ORIENTED SYSTEMS AND CLOUD-BASED ENVIRONMENTS (MESOCA)
页码15-22
收录类别EI
会议地点Bremen, GERMANY
会议日期OCT 02-02, 2015