A Validated Model of a Fault-Tolerant System
The recovery and repair durations of large fault-tolerant systems generally span several orders of magnitude. The distributions also violate the common modeling assumption of an exponential distribution for the recovery and repair time. A reward-based semi-Markov model is presented that can be used to predict the steady-state availability of such systems as well as evaluate design trade-offs with respect to their impact on system availability. The model has been validated against field outage data from a large system.
KeywordsAvailability modeling Markov models Fault-tolerant system
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