WEB DELAY ANALYSIS AND REDUCTION BY USING LOAD BALANCING OF A DNS-BASED WEB SERVER CLUSTER

Y.W. Bai and Y.C. Wu

Keywords

System performance, modelling techniques, measurement techniques, web servers, load balance, system response time

Abstract

Based on our survey of recent articles, there is little research being conducted into quantitative analysis of the load balancing of Web server clusters. In this paper, we propose a quantitative analysis for DNS-based server clusters. We also propose a two-pass load-balancing method for determining the load balance area of these clusters. The first pass uses the lookup table instead of a complicated computation for obtaining the load balancing of the Web service requests. The second pass also utilizes a lookup table by a precomputed Hessian matrix to obtain the load balancing. In addition, we compare the relative performance of dispatcherbased and DNS-based server clusters using queuing theory, analysis, and simulation, and we compare the measurement results using benchmarks. To increase the simulation performance we have designed a simulation module to promptly locate the load balancing, with a potential improvement of 36.58% over the average system response time.

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