Response time control for web servers under realistic traffic patterns

Service provisioning for Internet servers, as well as many other servers, plays a very important role in the cost and performance of the server. Service/content providers are required to maintain a certain Quality of Service (QoS) either contractually or implicitly in order not to lose customers. In this paper we investigate the control theoretic approaches for service provisioning. We compare between 2 widely used approaches and a simple technique we propose for admission control in order to maintain the agreed upon QoS. We show using simulation that our proposed technique is more stable, needs less overhead, and produce better results than these 2 previously proposed techniques.