The Study Of Realizating Web Server Cluster System Load Balancing By Optimizing Allocation Of Files

With the explosive growth of Internet and World Wide Web's traffic, High Scalability, Reliability, Availability and Efficient Cost/Performance ratio are strongly required for the Information Service Platform-Network Servers. Server Cluster is a newly developed technology with the thriving of the Internet and the Web. Achieving load balancing by request dispatching is one of the basic strategies for improving the performance and efficiency of this kind of systems. Although a lot of researches have been made within this field, people pay importance to the form's dispatching and ignore the distribution and correlation of the files on the latter's servers. On the basis of the anterior researches, this paper studies on a series of characteristics of the web files, such as copies and correlation. After analyzing the ability of the servers, all files are allocated to the servers suitably, which realizes the load balancing of the server cluster. The contributions of this paper are as the following:1 Studying the characteristics of all kind of web files, and optimizing the web files according to these characteristics.2 Realizing the monitor system of the visit and the distribution of the latter's web files.3 This paper produces the conditional-visit-probability, the copies and the correlation of the web files, and studying the operation method.4 This paper produces and realizes an algorithm of the web file classification æ¡­ile Cluster.5 Studying and improving the optimizing allocation theory of the files, and realizing the material allocation by the cupidity and the genetic algorithm.6 Producing the initializing optimizing allocation , the periodic optimizing allocation and the instant optimizing allocation of the web files.