Linux服务器集群系统(四)[11]

　　因为请求的服务时间差异较大，内核中的连接调度算法容易使得服务器运行出现倾斜。为此，给出了一个动态反馈负载均衡算法，结合内核中的加权连接调度算法，根据动态反馈回来的负载信息来调整服务器的权值，来调整服务器间处理请求数的比例，从而避免服务器间的负载不平衡。动态反馈负载算法可以较好地避免服务器的倾斜，提高系统的资源使用效率，从而提高系统的吞吐率。
　　
　　参考文献
　　
　　William Stalling, Viewpoint: Self-similarity upsets data traffic assumptions, IEEE Spectrum, January 1997.
　　Kihong Park, Gitae Kim, Mark Crovella, "On the Effect of Traffic Self-similarity on Network Performance", In Proceedings of the 1997 SPIE International Conference on Performance and Control of Network Systems, 1997.
　　Nicolas D. Georganas, Self-Similar ("Fractal") Traffic in ATM Networks, In Proceedings of the 2nd International Workshop on Advanced Teleservices and High-Speed Communications Architectures (IWACA'94), pages 1-7, Heidelberg, Germany, September 1994.
　　Mark Crovella and Azer Besavros, Explaining World Wide Web Traffic Self-Similarity. Technical report, Boston University, October 1995, TR-95-015.
　　Bruce A. Mah. An Empirical Model of HTTP Network Traffic. In Proceedings of INFOCOM 97, Kobe, Japan, April 1997.
　　Red Hat High Availability Server Project, http://ha.redhat.com/
　　The Linux Virtual Server Project, http://www.LinuxVirtualServer.org/