Tae Mu Chang , Won Shig Myung , Jun Tak Han

The KIPS Transactions:PartA, Vol. 12, No. 2, pp. 151-160, Apr. 2005
10.3745/KIPSTA.2005.12.2.151,   PDF Download:

Abstract

The exponential growth of Web users requires the web servers with high expandability and reliability. It leads to the excessive transmission traffic and system overload problems. To solve these problems, cluster systems are widely studied. In conventional cluster systems, when the request size is large owing to such types as multimedia and CHI, the particular server load and response time tend to increase even if the overall loads are distributed evenly. In this paper, a cluster system is proposed where each Web server in the system gas different contents and loads are distributed efficiently using the Web server resource information such as CPU, memory and disk utilization. Web servers having different contents are mutually connected and managed with a network file system to maintain information consistency required to support resource information updates, deletions, and additions, Load unbalance among contents group owing to distribution of contents can be alleviated by reassignment of Web servers. Using a simulation method, we showed that our method shows up to 50 % about average throughput and processing time improvement comparing to systems using each LC method and RR method.

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