Design, Implementation and Performance of Resource Management Scheme for TCP Connections at Web Proxy Servers

A great deal of research has been devoted to tackling the problem of network congestion against the increase of Internet traffic. However, there has been little concern regarding improvements of the performance of Internet servers in spite of the projections that the bottleneck is now being shifted from the network to endhosts. We have previously proposed a scheme called SSBT (Scalable Socket Buffer Tuning) that is intended to be used to improve the performance of Web servers by maintaining their resources for TCP connections effectively and fairly. On the current Internet, however, a significant amount of Web document transfer requests are sent through Web proxy servers. Accordingly, in this paper, we propose a new resource/connection management scheme for Web proxy servers to improve their performance and reduce the elapsed Web document transfer time when using proxy servers. We validate the effectiveness of our proposed scheme through simulation experiments, and confirm conclusively that it can be used to manage resources effectively. Additionally, we implement the proposed scheme on an actual Web proxy server, and examine its performance by using benchmark tests that consider the Web access model, in terms of the proxy server throughput and document transfer delay.