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WebSeAl: Web Server Allocation

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working paper, New York University Lucent Technologies Technion, (October 1997)

Abstract

We propose a technique which pushes the server allocation functionality onto the client. We argue that his approach scales well and may result in increased performance in many cases. Building on theoretical work based on game theory, we show that the usage of individual replicas can be effectively controlled with cost functions even when the clients are noncooperative. We present the design and implementation of WebSeAl, our prototype system realizing these techniques. WebSeAl does not require any changes to existing client and server code, conforms to HTTP standards, and does not generate any control messages. Preliminary experiment results utilizing servers on six continents and in a controlled setting indicate that WebSeAl improves performance while imposing little overhead.

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