关键词: Web集群服务器, 混合页面访问, 负载均衡, 优化权重

Abstract: The open-loop load-balancing algorithm is used to deal with the mixed-pages service requests, which leads to higher load of local servers and reduces the system efficiency in the clustered Web-servers. A closed-loop load distribution strategy based on dynamic optimal adjustment is proposed to solve the problem. It establishes a load model for dealing with mixed-pages containing static pages and dynamic pages according to the characteristic of the service dealing with type of Web request pages and forms an internal dynamic mapping relationship between different service requests and load-balancing to optimize the way of caching and calling static pages. The method based on dynamic prediction of server load rate and equilibrium index adopts an optimal assignment model for task weights with minimum deviation between load rates to calculate optimal task weights for server cluster and achieve load-balancing allocation strategy and algorithm for server cluster dealing with mixed-pages service requests. The simulation experiment results verify the correctness and effectiveness of the load-balancing algorithm proposed in this paper and show that the algorithm can achieve a better load balancing.

Key words: clustered Web-servers, mixed-pages service requests, load-balancing, optimized weigh