Deciding which queue to join: Some counterexamples
Operations Research
Managing server energy and operational costs in hosting centers
SIGMETRICS '05 Proceedings of the 2005 ACM SIGMETRICS international conference on Measurement and modeling of computer systems
Analysis of join-the-shortest-queue routing for web server farms
Performance Evaluation
Automated performance assessment for service-oriented middleware: a case study on BPEL engines
Proceedings of the 19th international conference on World wide web
Optimality analysis of energy-performance trade-off for server farm management
Performance Evaluation
Load-Balancing Dynamic Service Binding in Composition Execution Engines
APSCC '10 Proceedings of the 2010 IEEE Asia-Pacific Services Computing Conference
Web Services: Concepts, Architectures and Applications
Web Services: Concepts, Architectures and Applications
A workload characterization study of the 1998 World Cup Web site
IEEE Network: The Magazine of Global Internetworking
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The load on today's service-oriented systems is strongly varying in time. It is advantageous to conserve energy by adapting the number of replicas according to the recent load. Over-provisioning of service replicas is to be avoided, since it increases the operating costs. Under-provisioning of service replicas leads to serious performance degradation and violates service-level agreements. To reduce energy consumption and maintain appropriate performance, we study two service replication strategies: (1) arrival rate based and (2) response time based policy. By simulation, we show that the average number of service replicas and response time can be reduced especially when combining our proposed replication strategies and load balancing schemes.