Performability enhancement of fault-tolerant software
| Autor: | A.T. Tai, John F. Meyer, Algirdas Avizienis |
|---|---|
| Rok vydání: | 1993 |
| Předmět: |
Computer science
business.industry Reliability (computer networking) Fault tolerance Software quality Reliability engineering Software Software fault tolerance Dependability Electrical and Electronic Engineering Layer (object-oriented design) Safety Risk Reliability and Quality business Realization (systems) |
| Zdroj: | IEEE Transactions on Reliability. 42:227-237 |
| ISSN: | 0018-9529 |
| DOI: | 10.1109/24.229492 |
| Popis: | Model-based performability evaluation is used to assess and improve the effectiveness of fault-tolerant software. The evaluation employs a measure that combines quantifications of performance and dependability in a synergistic manner, thus capturing the interaction between these two important attributes. The specific systems evaluated are a basic realization of N-version programming (NVP) (N=3) along with variants thereof. For each system, its corresponding stochastic process model is constructed in two layers, with performance and dependability submodels residing in the lower layer. The evaluation results reveal the extent to which performance, dependability, and performability of a variant are improved relative to the basic NVP system. More generally, the investigation demonstrates that such evaluations are indeed feasible and useful with regard to enhancing software performability. > |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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