量化测试高性能L5-Dispatcher

主要内容是关于HTTP Splicing的性能评测．HTTP Splicing是针对TCP Splicing的缺陷而提出的，TCP Splicing现被广泛应用在L5-Dispatcher(即基于内容的Web交换机)中．测试内容包括开销测试、性能测试、与L4-Dispatcher的对比测试、与TCP Splicing的对比测试和扩展性测试．所获得的结论为：当尽力(best effort)访问1KB大小的文件时，HTTP Splicing的性能要比TCP Splicing至少快3．5倍，而当尽力访问10KB大小的文件时，HTTP Splicing的性能比TCP Splicing的性能高22％．当尽力访问307KB大小的文件时，HTTP Splicing的一种实现——WebPatcher-的最好性能值为5556．8replies／s，超过了ArrowPoint公司的CS-100(1193 replies／s)和Alteon公司的ACEdirector3(v6．0．25)(1356replies／s)．

Quantitative Measurement of High Performance L5-Dispatcher

This paper is mainly concerned with the performance evaluation of HTTP Splicing. Aiming at the flaws of TCP Splicing, HTTP Splicing, a method adopted widely by L5-dispatcher which is a sort of web content switch, is put forward. The testing methods include overhead testing, performance testing, testing contrasted with L4-dispatcher, testing contrasted with TCP Splicing, and scalability testing. The conclusions are: when accessing a 1KB file under best effort model, performance of HTTP Splicing is better than that of TCP Splicing at least by 3.5; while accessing a 10KB files under best effort model, performance of HTTP Splicing improves that of TCP Splicing by 22%. When accessing a 307 bytes file under best effort model, the best performance of an implementation of HTTP Splicing, WebPatcher, is 5556.8 replies/s, outdoing ArrowPoint Co.'s CS-100(1193 replies/s) and Alteon Co.'s ACEdirector 3(v6.0.25)(1356 replies/s).