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Long running software systems are known to experience an aging phenomenon called software aging, one in which the accu- mulation of errors during the execution of software leads to perfor- mance degradation and eventually results in failure. To counteract this phenomenon a proactive fault management approach, called software rejuvenation, is particularly useful. It essentially involves gracefully ter- minating an application or a system and restarting it in a clean internal state. In this paper, we reconsider the non-homogeneous Markovian models for a single-server type of software system with re- juvenation in Garg et al. (1998), and revisit them from the theoretical view point. More precisely, it is assumed in these models that soft- ware failures can occur with positive probability during idle periods in transaction systems, but we exclude this unreasonable situation in our rened models.

Refined non-homogeneous markovian models for a single-server type of software system with rejuvenation