DNS was found to be of limited value for the purposes of load balancing and fault tolerance of scalable. Web server clusters. The research described in

Load Balancing a Cluster of Web Serve
† Using Distributed Packet Rewriting Luis Ave
a Azer Bestavros Lave
a@cs.bu.edu Bestavros@cs.bu.edu Computer Science Department Boston Unive
ity Abstract In this paper, we present and evaluate an implementation of a prototype scalable web server. The prototype co
ists of a load-balanced cluster of hosts that collectively accept and service TCP connectio
. The host IP addresses are advertised using the Round Robin DNS (RR-DNS) technique, allowing any host to receive requests from any client. Once a client attempts to establish a TCP connection with one of the hosts, a decision is made as to whether or not the connection should be redirected to a different host—namely, the host with the lowest number of established connectio
. We use the low-overhead Distributed Packet Rewriting (DPR) technique [Bestavros, Crovella, Liu, and Martin 1998] to redirect TCP connectio
. In our

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