원문정보
초록
영어
Web services have been widely applied in e-business or organizations to establish versatile applications. However, service composition with constraint to QoS constraints still remains as a challenging issue, because both the service performance and the QoS requirements of applications tend to be dynamically changed at runtime. To address this problem, in this paper we present a novel service composition framework, which takes advantage of flexibility provided by cloud systems and applies evolution strategy to solve the optimal programming problem of multiple QoS constrained service composition. Furthermore, a QoS negation mechanism is proposed to satisfy the dynamical and elastic cloud environments. Massive experiments are conducted to investigate the effectiveness of the proposed framework, and the results show that it can significantly reduce the costs of large-scale service-based application in terms of various QoS metrics.
목차
1. Introduction
2. Related Work
3. Cloud-based Service Composition Framework
3.1. System Architecture
3.2. QoS Measurements of Web Services
3.3. Evolution Strategy based Service Composition Algorithm
3.4. QoS Negotiation in Cloud Environment
4. Experiments Evaluation and Analysis
4.1. Experimental Settings
4.2. Performance Comparison
4.3. Efficiency Comparison on Composition Algorithms
5. Conclusion
References