A web QoS strategy based on session for web cluster system

The increasing of Hypertext Transfer Protocol (HTTP) requests often degrades the performance of the web server cluster. Consequently, the user's anticipated quality of service (QoS) cannot be guaranteed. This is the typical problem that Service-Level web server cluster must face. In this paper, a Web QoS strategy based on the cluster system is proposed. In the web cluster, the front-end dispatcher dispatches the HTTP requests in a session to the back-end server as a whole to ensure the load balance among the back-end servers. The session-based Web QoS strategy is utilized in the back-end servers. The simulation experiments showed that the load balance of the system is improved and average response time of the system is decreased.