Performance and Service Delay Guarantees for Web Servers: A Robust Control Approach

This paper applies the Feedback Error Learing and H framework to develop a robust model and adaptive architecture for web server performance control and service delay guarantees. Web server model is approximated with a two tank system that includes many uncertainly components. In contrast with web server delay control that only control delay, our architecture based on H robust control and queuing model predictor enforce server utilization and delay guarantees for different classes on virtual servers. A simulation evaluation demonstrates that H robust control can provide robust request utilization and request response time for Internet servers.