College Of Information Science And Technology

Along with the increase of users and browsing tasks in Internet and Intranet, the single Web cluster is likely to be the new bottleneck of network visiting for its limited capability. The web server cluster has the features of high availability, and load balancing, and scalability. So it becomes the best solution for the preceding problem. This paper does some research about the design and realization of web server clusters. First the paper analyses the technique of the existing web server cluster system, introduces some typical web cluster systems, and discusses the work's theory and realization's technique of high availability and load balancing emphatically. This paper proposes a software method of establishing a web server cluster system in Local Area Network. The paper analyses the performance of web server cluster system with the queue theory, and then describes the work's theory and realization's solution of the system in detail. That is realizing the communication mechanism of the system with socket, realizing dynamic load balancing with Real-time collecting performance data of web servers and periodical judging of light loading web cluster, realizing high availability with checking running state of web servers periodically, ensuring the steady running of the system with the double progress technique. The project and result of test is put forward at the end of the paper.