2010
DOI: 10.1007/978-3-642-17358-5_44
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A Soft Constraint-Based Approach to QoS-Aware Service Selection

Abstract: Abstract. Service-based systems should be able to dynamically seek replacements for faulty or underperforming services, thus performing self-healing. It may however be the case that available services do not match all requirements, leading the system to grind to a halt. In similar situations it would be better to choose alternative candidates which, while not fulfilling all the constraints, allow the system to proceed. Soft constraints, instead of the traditional crisp constraints, can help naturally model and… Show more

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Cited by 19 publications
(10 citation statements)
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References 6 publications
(8 reference statements)
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“…The problems have been modeled as a 0-1 knapsack problems [16], [17], constraint optimization problems [18], [19], multi-dimensional and/or multi-objective optimization problems [20], [21], weighted directed acyclic graph problems [22], [23], and mathematical programming problems [24], [25]. Accordingly, many algorithms have been proposed.…”
Section: Global Optimization Approachesmentioning
confidence: 99%
See 1 more Smart Citation
“…The problems have been modeled as a 0-1 knapsack problems [16], [17], constraint optimization problems [18], [19], multi-dimensional and/or multi-objective optimization problems [20], [21], weighted directed acyclic graph problems [22], [23], and mathematical programming problems [24], [25]. Accordingly, many algorithms have been proposed.…”
Section: Global Optimization Approachesmentioning
confidence: 99%
“…Soft constraints-based algorithms are adopted in order to allow constraint violations in less likely feasible compositions when the requirements of the global QoS constraints are overly strict [19], [39], [40]. They are proposed to predict run-time service level agreement violations for composite services.…”
Section: Global Optimization Approachesmentioning
confidence: 99%
“…An overconstrained SL means that its encompassing SLOs contain very restrictive constraints that cannot be satisfied. As the root of this problem is that SLOs are expressed as hard constraints that must be satisfied at all costs to infer the matchmaking, its solution may come through the use of soft constraints [Zemni et al 2010]. In particular, if SLOs are expressed as soft constraints, where the user expresses their significance through using weights or levels, then not all of them have to be satisfied when matching.…”
Section: Soft Constraintsmentioning
confidence: 99%
“…Therefore, no service behavior is considered and it is not possible to quantitatively reason on similarity/preference involving different services: it is not possible to widen the results of a query by obtaining similar services. In [19], a semiring-based framework is used to model and compose QoS features of WSs. However, no notion of similarity relationship is given in in [19].…”
Section: Related Workmentioning
confidence: 99%
“…In [19], a semiring-based framework is used to model and compose QoS features of WSs. However, no notion of similarity relationship is given in in [19].…”
Section: Related Workmentioning
confidence: 99%