Titlebook: Software Performability: From Concepts to Applications; Ann T. Tai,John F. Meyer,Algirdas Avi?ienis Book 1996 Kluwer Academic Publishers 1

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0893-3405 ft and spacecraft), and air traffic control.Moreover, experience has shown that the dependability of such systemsis particularly sensitive to that of its software components, both thesystem software of the embedded computers and the application softwarethey support. ..Software Performability: From C

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Introduction,that model-based means of evaluating such systems have likewise evolved from methods originating in one field or another, merged in various ways to satisfy differing evaluation needs. As these systems become more physically and logically complex, challenges regarding their evaluation fail to subside

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Viable Techniques for Model Construction and Solution, purpose of software performability evaluation. This is not to say that a particular method, if used exclusively, will suffice; what will generally be required is some appropriate combination of techniques for model specification, construction, and solution. Also, although certain of these methods a

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Case Study I: Comparative Studies of Fault-Tolerant Software,tation delays. These, in turn, may have an adverse effect on system dependability, e.g., in real-time applications, an increased probability of failing to meet a deadline. More generally, such interactions and tradeoffs between performance and dependability affect the user-perceived benefits of a pa

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Case Study II: Performability-Management Oriented Adaptive Fault Tolerance, react adaptively to these changes in order to make the service dependable with respect to what the user demands. Accordingly, during the past several years, increased attention has been given to the notion of dynamic optimization with respect to either fault tolerance or performance. Kim and Lawren

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Case Study III: Performability Management in Distributed Database Systems,e context of distributed computing for adaptive decision making is very difficult and costly for at least two reasons. First, obtaining information about remote sites requires additional message passing such that the benefits from adaptive mechanisms could be negated by a performance penalty. Second