QoS-Aware Middleware for Web Services Composition
IEEE Transactions on Software Engineering
Efficient algorithms for Web services selection with end-to-end QoS constraints
ACM Transactions on the Web (TWEB)
Adaptive Service Composition in Flexible Processes
IEEE Transactions on Software Engineering
A framework for QoS-aware binding and re-binding of composite web services
Journal of Systems and Software
Self-adaptive software: Landscape and research challenges
ACM Transactions on Autonomous and Adaptive Systems (TAAS)
Combining global optimization with local selection for efficient QoS-aware service composition
Proceedings of the 18th international conference on World wide web
Optimizing Service Systems Based on Application-Level QoS
IEEE Transactions on Services Computing
On optimal service selection in Service Oriented Architectures
Performance Evaluation
Per-flow optimal service selection for Web services based processes
Journal of Systems and Software
A constraint-based approach to horizontal web service composition
ISWC'06 Proceedings of the 5th international conference on The Semantic Web
An integrated framework for QoS-based adaptation and exception resolution in WS-BPEL scenarios
Proceedings of the 28th Annual ACM Symposium on Applied Computing
Resource virtualization and service selection in cloud logistics
Journal of Network and Computer Applications
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Service selection has been widely investigated as an effective adaptation mechanism that allows a service broker, offering a composite service, to bind each task of the abstract composition to a corresponding implementation, selecting it from a set of candidates. The selection aims typically to fulfill the Quality of Service (QoS) requirements of the composite service, considering several QoS parameters in the decision. We compare the performance of two representative examples of the perrequest and per-flow approaches that address the service selection issue at a different granularity level. We present experimental results obtained with a prototype implementation of a service broker. Our results show the ability of the per-flow approach in sustaining an increasing traffic of requests, while the per-request approach appears more suitable to offer a finer customizable service selection in a lightly loaded system.