AutoSeC: An Integrated Middleware Framework for Dynamic Service Brokering
Qi Han · 2003
In this paper, we integrate components for (a) resource provisioning and (b)information collection that allows for cost-effective enforcement of application QoS while tolerating imprecision of system state information. We discuss a family of policies for each component and provide mechanisms for dynamically selecting the appropriate combinations of the policy. Our objective is to select suitable management policies that maximizes the number of concurrent supported users while minimizing the overhead needed to ensure QoS enforcement for these users. Our performance results indicate that the “best” combination of policies is dependent on existing system conditions. However, we generally observe that the highly adaptive dynamic range-based information collection mechanisms exhibit superior performance under most system conditions and user workloads. All of these observations are applied into our integrated middleware framework AutoSeC (Automatic Service Composition). AutoSeC provides support for dynamic service brokering that ensures effective utilization of system resources in a distributed environment.