摘要
传统的负载均衡技术只考虑服务器的负载来重定向用户的请求,不能保证对用户的响应性能,采用基于网络拓扑的内容分送网络(CDN)内容路由技术,根据时延、跳数、拓扑距离等距离尺度对用户请求进行重定向,可以获得最佳的用户响应性能.最简单的基于网络拓扑的CDN内容路由算法是直接测量请求用户到各个服务器之间的距离,然后据此作出路由选择,但这种算法需要很长的计算时间.一种改进算法是采用基于网络拓扑分割的内容路由算法.研究结果表明,该算法不仅可以保持与简单算法相当的性能,而且可以大大减少计算时间.
The traditional load balancing technology only considers the server load to redirect the user request, which cannot assure the performance of the response to the user. One improved method was the content routing algorithms achieving network proximity, which can redirect the user request to the best server according to network distance such as network delay, hops, topology distance etc.. The simplest content routing algorithms achieving network proximity was to redirect the user request according to the measurement of the distance between the servers and the request user. But the algorithm consumes much time. An improved method is the content routing algorithm based on network topology segmentation. The study results indicate that the method can achieve similar performance as the simplest algorithm but can reduce the routing time obviously.
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2004年第4期414-419,共6页
Journal of Zhejiang University：Engineering Science
基金
国家"863"高技术发展计划资助项目(2001AA121043)
浙江省综合信息网技术重点实验室资助.
