基于主动测试的HTTP业务性能分析  

Performance Analysis of HTTP Service Based on Network Active Measuremnet

作　　者：范超[1] 谢高岗[2] 张大方[3] 李忠诚[2] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082 [2]中国科学院计算技术研究所信息网络研究室,北京100080 [3]湖南大学软件学院,长沙410082

出　　处：《计算机研究与发展》2005年第3期493-500,共8页Journal of Computer Research and Development

基　　金：国家自然科学基金项目(60403031;60273070)国家"八六三"高技术研究发展计划基金项目(2002AA121032)中国科学院计算技术研究所青年创新基金项目(20026180-14)

摘　　要：Web业务在当前Internet流量中占有重要地位,而网络路径对HTTP业务性能的影响直接决定了用户可察觉的Web服务器访问的响应时间和页面下载速率的差异.通过主动业务仿真方法,测量端到端路径HTTP业务的性能表现,分析了业务响应时间的构成与分布特征,发现对同一页面在不同时间访问的下载速率表现出高可变性,证明常用的基于均值-标准差的性能故障检测判别方法并不完全适用于该类性能参数,提出了基于盒式图的端到端路径HTTP业务性能故障检测算法.Internet workload is dominated by Web traffic today, which demonstrates its perceived performance by some well-known metrics, such as response time and download rate. The popular approaches to measuring HTTP performance are Web server and client logs, or traffic traces. The performance differences are compared to improve protocol design and implementation by building corresponding pattern to various parameters from different levels existing behind Web browsing, such as the number of connections per page, the connection sizes, etc. , or by simulating HTTP processes under different workload or version. But the customers' urgent demand is how to detect service response time and Web page download rate, which provide impactful knowledge to pinpoint the source of HTTP performance problems, and how to detect performance outliers and alarm timely. The performance of HTTP service along the end-to-end path is obtained through the method of active measurement. Furthermore, with the experimental data the composing and distribution of HTTP service response time are analyzed. And the high variation of the download rate is found in multiple accesses to the same Web page, which proves that some popular approaches to performance fault detection, such as mean and standard deviation calculation, do not fully serve the turn. Therefore a better algorithm based on box plots to detect performance outliers of HTTP service is presented.

关 键 词：主动测试 业务仿真 HTTP性能分析 故障检测 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]