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A QoS Optimization Model for Service Composition

Authors:
Silvana De Gyvés Avila
Karim Djemame

Keywords: Web service composition; adaptation; optimization; Quality of Service

Abstract:
The dynamic nature of the Web service execution environment generates frequent variations in the Quality of Service offered to the consumers, therefore, obtaining the expected results while running a composite service is not guaranteed. Adaptation approaches aim to maintain functional and quality levels, by dynamically adapting composite services to the environment conditions reducing human intervention. This paper presents an adaptation approach based on self-optimization. The proposed optimization model performs service selection based on the analysis of historical and real QoS data, gathered at different stages during the execution of composite services and the establishment of priorities between the service quality attributes. Experimental results show significant improvements in the global QoS of the use case scenario, providing reductions up to 16% in the global cost and 14% in response time.

Pages: 24 to 29

Copyright: Copyright (c) IARIA, 2012

Publication date: July 22, 2012

Published in: conference

ISSN: 2308-4146

ISBN: 978-1-61208-219-6

Location: Nice, France

Dates: from July 22, 2012 to July 27, 2012