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In order to adapt to the dynamically changing web service resources in the open environment and ensure the composite service meet the business requirements continuously, the paper presents a service-cluster based approach to service substitution. Substitution means replacing a component with another component, as long as the replacing component produces the(More)
This paper presents a two-stage service migration decision method which combines business workload forecasting with real-time load sensing, and thus adds business forecasting to previous load balancing approaches that rely solely upon real-time load sensing. The migration decision procedure and the detailed causal analysis algorithms based on Bayesian(More)
A serious challenge that confronts multi-tenant service systems is finding an optimized deployment strategy according to their business scale and operating characteristics. The tenants want to rent high performance services and services providers demand minimizing cost at the same time of meeting the requirements of tenants. But there are often(More)
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