Measurement, Modelling, and Evaluation of Computing Systems by Philip Koopman, Justin Ray (auth.), Bruno

By Philip Koopman, Justin Ray (auth.), Bruno Müller-Clostermann, Klaus Echtle, Erwin P. Rathgeb (eds.)

This e-book constitutes the refereed lawsuits of the fifteenth overseas GI/ITG convention on "Measurement, Modelling and review of Computing structures" and "Dependability and Fault Tolerance", held in Essen, Germany, in March 2010. the nineteen revised complete papers offered including five software papers and a pair of invited lectures have been rigorously reviewed and chosen from forty two preliminary submissions. The papers disguise all elements of functionality and dependability review of structures together with networks, machine architectures, allotted platforms, software program, fault-tolerant and safe platforms.

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Extra resources for Measurement, Modelling, and Evaluation of Computing Systems and Dependability and Fault Tolerance: 15th International GI/ITG Conference, MMB&DFT 2010, Essen, Germany, March 15-17, 2010. Proceedings

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Frames that do not pass through the FlexWay are called local frames. The main objective is to enable local communication as well as global communication. For this purpose FlexWay should provide switching services and should have access to the global time. 2 Schedule in Multi-Cluster Systems To achieve an efficient utilization of the system a good piece of work in forming a suitable schedule is required. In the meanwhile, many algorithms that provide a good or even an optimal schedule have been established.

1 Compositional Reliability Assessment for Parallel Systems Let’s consider first the parallel system consisting of k mutually exclusive components shown in Fig. 6. Component 1 γ1 γ2 Component 2 .. γk Component k Fig. 6. System consisting of mutually exclusive components If each component i ∈ {1,…,k} is selected at probability γi during operation, then the failure probability of the whole system is k p = ∑ γ i pi (4) i =1 Due to ~ ⎛ p P(γ i ⋅ p i ≤ ~ pi ) = P⎜⎜ p i ≤ i γi ⎝ ⎞ n ⎟⎟ = 1 − exp(− i ⋅ ~ pi ) γi ⎠ (5) for any i∈{1,…,k} and any γi with 0 ≤ γi≤ 1, each pi (s.

Software Reliability Assessment Based on the Evaluation of Operational Experience 35 Table 7. 0001 and different usage profiles Table 8 shows the corresponding confidence levels. Table 8. e. γi = 1/5, 1≤i≤k). Table 9. 2 Examples for Serial Systems Table 10 shows the upper bound ~ p which can be determined for a serial system with k=2, 3 resp. 4 components at confidence 99%. 36 S. Söhnlein et al. Table 10. 000219 Table 11 shows the confidence level β at which ~ p =10-4 can be validated for a serial system with k = 2, 3 resp.

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