Workload characterization in Web caching hierarchies

Bai, Guangwei; Williamson, Carey

doi:10.1109/mascot.2002.1167056

Cited by 7 publications

(1 citation statement)

References 21 publications

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“…Bad requests are those requests that too cause the proxy to keep copies of the miss objects but the copy will not be accessed again before it is being ejected from the cache. The corresponding stored copies of the bad-miss requests are called one-timer objects [17]. The caching of the good-miss requests reduces both network load and the response delay to the clients.…”

Section: Introductionmentioning

confidence: 99%

A Proxy Load Reduction Technique to Improve Web performance

Sofi¹,

Garg²

2015

IJERT

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The rapid growth of World Wide Web has caused serious performance degradation on the Internet. Web traffic has increased tremendously since the beginnings of the 1990s and overloading conditions of proxy servers occur repeatedly on Internet. Many people have started calling the WWW the World Wide Wait. In order to solve the problem of overloading on proxy servers, a new approach by extending cache memory close to the proxy server which stores a list of the most popular Websites, called the hot-site list, to reduce the unnecessary requests reaching to proxy server caches has been proposed in this work. These unnecessary client requests called the miss requests which cause the proxy caches to store copies of the requested information but the copies will not be accessed again. If the requests are not available in the hot-site list, then the forward proxy will forward the request to the original server. This is made possible only when the browsers are informed about the list of popular Websites. In this research, the extended cache memory on server side is used which may be in the form of hard disk to reduce load and response time on the proxy server which in turn improves the performance of Web. This extended cache memory placed at proxy server side. This research also focused on the working of the existing Web cache proxy server.

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Section: Introductionmentioning

confidence: 99%

A Proxy Load Reduction Technique to Improve Web performance

Sofi¹,

Garg²

2015

IJERT

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Time-domain analysis of Web cache filter effects

Bai¹,

Williamson²

2004

Performance Evaluation

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This paper uses trace-driven simulation to study the traffic arrival process for Web workloads in a simple Web proxy caching hierarchy. Both empirical and synthetic Web proxy workloads are used in the study. The simulation results show that a Web cache reduces both the peak and the mean request arrival rate for Web traffic workloads, while the variance-to-mean ratio of the filtered traffic typically increases, depending on the input arrival process and the configuration of the cache. If the input traffic is self-similar, then the filtered request traffic remains self-similar, with the same Hurst parameter, though with reduced mean. Finally, we find that a Gamma distribution provides a flexible and robust means of modeling aggregate workloads in hierarchical Web caching architectures, for a broad range of workload characteristics and Web proxy cache sizes. To demonstrate the generality and effectiveness of the modeling approach, we present a detailed example of filter effects and traffic superposition in a two-level Web caching hierarchy with heterogenous input workloads. The Gamma modeling results match well with the results from trace-driven simulations.

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WebTraff: a GUI for Web proxy cache workload modeling and analysis

Markatchev

Williamson

Proceedings. 10th IEEE International Symposium on Modeling, Analysis and Simulation of Computer and Telecommunications Systems

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This paper describes an interactive graphical user interface (GUI) that can be used for the modeling and analysis of Web proxy workloads. The WebTraff GUI has three main components. First, the WebTraff tool provides a visual front-end to ProWGen, a Web proxy workload generation tool developed in prior work, which can be used for generating synthetic Web proxy workloads of arbitrary length, with userspecified statistical properties. Second, the WebTraff GUI provides tools for the analysis of Web proxy workload characteristics, including document size distribution, document popularity profile, and temporal locality properties. Third, the GUI provides a front-end to a simple Web proxy cache simulation program, which can be used in studies of Web proxy cache performance and cache filter effects.

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Workload characterization in Web caching hierarchies

Cited by 7 publications

References 21 publications

A Proxy Load Reduction Technique to Improve Web performance

A Proxy Load Reduction Technique to Improve Web performance

Time-domain analysis of Web cache filter effects

WebTraff: a GUI for Web proxy cache workload modeling and analysis

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