SCLIENT CAN BE FOUND IN: http://www.cs.rice.edu/CS/Systems/Web-measurement/ The widespread use of the World Wide Web and related applications places interesting performance demands on Web servers. The ability to measure the effect of these demands is important for tuning and optimizing the various software components that make up a Web server. To measure these effects, it is necessary to generate realistic HTTP client requests. Unfortunately, accurate generation of such traffic in a testbed of limited scope is not trivial. This paper examines pitfalls that one encounters when generating Web client traffic. We propose and evaluate a new methodology for Web traffic generation that can generate bursty traffic, with peak loads that exceed the capacity of the server. Finally, we use the proposed method to measure the performance of a Web server. For more details about this project refer to our USITS'97 paper in postscript or in html or contact us at gaurav@cs.rice.edu or druschel@cs.rice.edu. Click here for the source-code of the Web server capacity measurement tools that we developed in this project. Regards, Servio Lima