Journal ArticleDOI
Traffic analysis of a Web proxy caching hierarchy
TLDR
Web proxy workloads from different levels of a caching hierarchy are used to understand how the workload characteristics change across different levels to improve the performance and scalability of the Web.Abstract:
Understanding Web traffic characteristics is key to improving the performance and scalability of the Web. In this article Web proxy workloads from different levels of a caching hierarchy are used to understand how the workload characteristics change across different levels of a caching hierarchy. The main observations of this study are that HTML and image documents account for 95 percent of the documents seen in the workload; the distribution of transfer sizes of documents is heavy-tailed, with the tails becoming heavier as one moves up the caching hierarchy; the popularity profile of documents does not precisely follow the Zipf distribution; one-timers account for approximately 70 percent of the documents referenced; concentration of references is less at proxy caches than at servers, and concentration of references diminishes as one moves up the caching hierarchy; and the modification rate is higher at higher-level proxies.read more
Citations
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Proceedings ArticleDOI
Youtube traffic characterization: a view from the edge
TL;DR: This paper presents a traffic characterization study of the popular video sharing service, YouTube, and finds that as with the traditional Web, caching could improve the end user experience, reduce network bandwidth consumption, and reduce the load on YouTube's core server infrastructure.
Journal ArticleDOI
The LCD interconnection of LRU caches and its analysis
TL;DR: An approximate analytic model is constructed for the case of LCD interconnection of LRU caches and used to gain a better insight as to why the LCD interconnections yields an improved performance.
Proceedings ArticleDOI
Impact of traffic mix on caching performance in a content-centric network
TL;DR: Results demonstrate that caching VoD in access routers offers a highly favorable bandwidth memory tradeoff but that the other types of content would likely be more efficiently handled in very large capacity storage devices in the core.
Proceedings ArticleDOI
A versatile and accurate approximation for LRU cache performance
TL;DR: The approximation is particularly useful in evaluating the performance of current proposals for an information centric network where other approaches fail due to the very large populations of cacheable objects to be taken into account and to their complex popularity law.
Journal ArticleDOI
Analysis of web caching architectures: hierarchical and distributed caching
TL;DR: This paper considers hierarchical and distributed caching, a hybrid caching architecture that combines hierarchical caching with distributed caching at every level of a caching hierarchy, and determines the optimal number of caches that should cooperate at each caching level to minimize client's retrieval latency.
References
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Journal ArticleDOI
Self-similarity in World Wide Web traffic: evidence and possible causes
Mark Crovella,Azer Bestavros +1 more
TL;DR: It is shown that the self-similarity in WWW traffic can be explained based on the underlying distributions of WWW document sizes, the effects of caching and user preference in file transfer, the effect of user "think time", and the superimposition of many such transfers in a local-area network.
Proceedings ArticleDOI
Generating representative Web workloads for network and server performance evaluation
Paul Barford,Mark Crovella +1 more
TL;DR: This paper applies a number of observations of Web server usage to create a realistic Web workload generation tool which mimics a set of real users accessing a server and addresses the technical challenges to satisfying this large set of simultaneous constraints on the properties of the reference stream.
ReportDOI
A hierarchical internet object cache
TL;DR: The design and performance of a hierarchical proxy-cache designed to make Internet information systems scale better are discussed, and performance measurements indicate that hierarchy does not measurably increase access latency.