ISAS '07 Proceedings of the 4th international symposium on Service Availability
User-perceived software service availability modeling with reliability growth
ISAS'08 Proceedings of the 5th international conference on Service availability
Analysis of a software system with rejuvenation, restoration and checkpointing
ISAS'08 Proceedings of the 5th international conference on Service availability
Journal of Systems and Software
Environmental diversity techniques of software systems
FGIT'11 Proceedings of the Third international conference on Future Generation Information Technology
Hi-index | 0.00 |
In recent years, considerable attention has been devoted to continuously running software systems whose performance characteristics are smoothly degrading in time. Software aging often affects the performance of a software system and eventually causes it to fail. A novel approach to handle transient software failures due to software aging is called software rejuvenation, which can be regarded as a preventive and proactive solution that is particularly useful for counteracting the aging phenomenon. In this paper, we focus on a high assurance software system with fault-tolerance and preventive rejuvenation, and analyze the stochastic behavior of such a highly critical software system. More precisely, we consider a fault-tolerant software system with two-version redundant structure and random rejuvenation schedule, and evaluate quantitatively some dependability measures like the steady-state system availability and MTTF based on the familiar Markovian analysis. In numerical examples, we examine the dependence of two fault tolerant techniques; design and environment diversity techniques, on the system dependability measures.