Abstract: With lots of medium and small companies adopting Web application technology for their enterprise information system(EIS), there is need for a good performance/price ratio Web server load balancer. On the one hand, the limited function of DNS round robin can’t meet with the requirements; on the other hand, the companies can’t afford the high cost of the hardware balancer. Aiming to this dilemma, an effective Web server load balancer based on Servlet technology of J2EE platform has been presented.

Key words: Web application, Load balancer, Servlet

摘要： 随着Web应用技术大量地应用到各中小企业的信息系统中，迫切需要一个能够提供良好性能价格比的Web服务器负载均衡系统。一方面由于Round Robin DNS技术的局限性达不到企业的要求，另一方面由于硬件负载均衡器的昂贵费用使中小企业无法承受。该研究采用J2EE平台的Servlet技术提供的Filter功能，设计并实现了一个比较适合中小企业的Web服务器负载均衡系统框架。

关键词: Web应用, 负载均衡器, Servlet