TAILIEUCHUNG - Measuring and Characterizing End-to-End Internet Service Performance

Fundamental to the design of reliable, high-performance network services is an understanding of the performance characteristics of the service as perceived by the client population as a whole. Understanding and measuring such end-to-end service performance is a challenging task. Current techniques include periodic sampling of service characteristics from strategic locations in the network and instrumenting Web pages with code that reports client-perceived latency back to a performance server. Limitations to these approaches include potentially nonrepresentative access patterns in the first case and determining the location of a performance bottleneck in the second. This paper presents EtE monitor, a novel approach to measuring Web site performance. Our system passively. | Measuring and Characterizing End-to-End Internet Service Performance LUDMILA CHERKASOVA Hewlett-Packard Laboratories YUN FU Duke University WENTING TaNg Hewlett-Packard Laboratories and AMIN VAHDAT Duke University Fundamental to the design of reliable high-performance network services is an understanding of the performance characteristics of the service as perceived by the client population as a whole. Understanding and measuring such end-to-end service performance is a challenging task. Current techniques include periodic sampling of service characteristics from strategic locations in the network and instrumenting Web pages with code that reports client-perceived latency back to a performance server. Limitations to these approaches include potentially nonrepresentative access patterns in the first case and determining the location of a performance bottleneck in the second. This paper presents EtE monitor a novel approach to measuring Web site performance. Our system passively collects packet traces from a server site to determine service performance characteristics. We introduce a two-pass heuristic and a statistical filtering mechanism to accurately reconstruct different client page accesses and to measure performance characteristics integrated across all client accesses. Relative to existing approaches EtE monitor offers the following benefits i a latency breakdown between the network and server overhead of retrieving a Web page ii longitudinal information for all client accesses not just the subset probed by a third party iii characteristics of accesses that are aborted by clients iv an understanding of the performance breakdown of accesses to dynamic multitiered services and v quantification of the benefits of network and browser caches on server performance. Our initial implementation and performance analysis across three different commercial Web sites confirm the utility of our approach. A short version of this article was published in USENIX 2002. A. Vahdat

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