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American Automatic Control Council


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Whitepaper: Utility-Driven Workload Management Using Nested Control Design

by American Automatic Control CouncilJan 01, 2008

In this white paper the authors build dynamic CPU allocation to applications on shared servers, and present a feedback control system consisting of two nested integral control loops for managing the QoS metric of the application along with the utilization of the allocated CPU resource. The control system was implemented on a lab test bed using the Apache Web server as the application and the 90th percentile of the response times as the QoS metric. By testing the system using a synthetic workload based on an industry benchmark, the two important features of the nested control design is validated.