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Unformatted text preview: Journal of Network and Systems Management, Vol. 13, No. 4, December 2005 ( c 2005) DOI: 10.1007/s10922-005-9000-y Thresholds Edited by Lawrence Bernstein Measurement and Analysis of HTTP Traffic Yogesh Bhole 1 , 2 and Adrian Popescu 1 Published online: 15 November 2005 The usage of Internet is rapidly increasing and a large part of the Internet traffic is generated by the World Wide Web (WWW) and the associated protocol HyperText Transfer Protocol (HTTP). Several important parameters that affect the performance of the WWW are bandwidth, scalability, and latency. To tackle these parameters and to improve the overall performance of the system, it is important to understand and to characterize the application level characteristics. This article is reporting on the mea- surement and analysis of HTTP traffic collected on the student access network at the Blekinge Institute of Technology in Karlskrona, Sweden. The analysis is done on var- ious HTTP traffic parameters, e.g., inter-session timings, inter-arrival timings, request message sizes, response code, and number of transactions. The reported results can be useful for building synthetic workloads for simulation and benchmarking purposes. KEY WORDS: World Wide Web; HyperText Transfer Protocol; performance; service level agreement . 1. INTRODUCTION The work on World Wide Web (WWW) started in 1989 with the development of a set of simple protocols and formats [ 1 ]. WWW has afterwards been more and more developed and also used as a test bed for sophisticated concepts for hyper- media and information retrieval. The consequence has been that WWW has had a major impact on modern life and influenced our lives in many ways. It has, for instance, become the preferred way of content distribution. Furthermore, the fact that the WWW technology is available on demand, made it very appealing to the user community. The Web technology has been quickly adapted for specific pur- poses like education, entertainment, and commercial environments (e.g., banking, 1 Department of Telecommunication Systems, School of Engineering, Blekinge Institute of Technol- ogy, Campus Grasvik, Karlskrona, Sweden. 2 To whom correspondence should be addressed 10, Suruchi, M. G. Road, Naupada, Thane(W.), Maharashtra 400602, India. E-mail: firstname.lastname@example.org. 357 1064-7570/05/1200-0357/0 C 2005 Springer Science + Business Media, Inc. 358 Bhole and Popescu shopping). As a consequence, researchers have been very active and did research to understand the complexity of WWW, to develop appropriate workload models for simulation and test bed purposes as well as to improve the performance. This is however a difficult task because the Web is actually consisting of a variety of software components (e.g., browsers, servers, proxies, back-end databases), and also due to the ever-changing characteristics of Internet traffic....
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