| Abstract: | Aiming at the load imbalance and poor scalability in single-tier Web server clusters, an efficient load balancing approach is proposed for constructing an N-hierarchical(multi-tier) Web server cluster. In each layer, multiple load balancers are set to receive the user requests simultaneously, and different load balancing algorithms are used to construct the high-scalable Web cluster system. At the same time, an improved load balancing algorithm is proposed, which can dynamically calculate weights according to the utilization of the server resources, and reasonably distribute the loads for each server according to the load status of the servers. The experimental results show that the proposed approach can greatly decrease the load imbalance among the Web servers and reduce the response time of the entire Web cluster system. |
