本文总结了目前基于L7的Web群集负载平衡调度研究,分析了影响性能的主要因素。在估计Web负载时考虑了请求强度以及Web服务器自身的性能,提出了处理能力异构服务器群集的最小负载调度算法。在算法中还同时考虑了服务器在进入临界状态时性能急剧下降的因素,避免群集进入临界状态,新算法能较为准确地跟踪群集系统的负载,更好地均衡分配负载。 This article summarizes the current L7-based Web Cluster Load Balancing Scheduling research, analyzes the main factors that affect performance. Considering the request strength and the performance of Web server in estimating Web load, a minimum load scheduling algorithm for heterogeneous server cluster is proposed. The algorithm also takes into account the server performance critical decline in critical conditions, to avoid the critical state of the cluster, the new algorithm can more accurately track the load on the cluster system to better distribute the load evenly.