Performance evaluation of composite Web services

Abstract

Composite Web service architectures are demanding much guarantee on the Quality of Service (QoS) in order to meet user requirements. Performance evaluation of these architectures has become therefore a very challenging issue, as the task is very complex due to synchronization inside the orchestration of services. We propose in this paper to use stochastic automata networks which a is powerful formalism as it provides semantics to specify synchronization within a very smart formalism. Contrary to previous approaches, the modeling and the performance evaluation of a variable number of remote service invocation become possible. The reported simulation results advocate the use of our approach in the performance evaluation of composite Web service architectures.

Keywords

• Stochastic Automata Networks (SAN)
• Markov Chain
• response times
• Composite Web services
• performance evaluation