How to scalably and accurately skip past streams

Supratik Bhattacharyya, André Madeira, S. Muthukrishnan, Tao Ye

    Research output: Chapter in Book/Report/Conference proceedingConference contribution


    Data stream methods look at each new item of the stream, perform a small number of operations while keeping a small amount of memory, and still perform much-needed analyses. However, in many situations, the update speed per item is extremely critical and not every item can be extensively examined. In practice, this has been addressed by only examining every Nth item from the input; decreasing the input rate by a fraction 1/N, but resulting in loss of guarantees on the accuracy of the post-hoc analyses. In this paper, we present a technique of skipping past streams and looking at only a fraction of the input. Unlike traditional methods, our skipping is performed in a principled manner based on the "norm" of the stream seen. Using this technique on top of well-known sketches, we show several-fold improvement in the update time for processing streams with a given guaranteed accuracy, for a number of stream processing problems including data summarization, heavy hitters detection and self-join size estimation. We present experimental results of our methods over synthetic data and integrate our methods into Sprint's Continuous Monitoring (CMON) system for live network traffic analyses. Furthermore, aiming at future scalable stream processing systems and going beyond state-of-art packet header analyses, we show how the packet contents can be analyzed at streaming speeds, a more challenging task because each packet content can result in many updates.

    Original languageEnglish (US)
    Title of host publicationWorkshops in Conjunction with the International Conference on Data Engineering - ICDE' 07
    Number of pages10
    StatePublished - 2007
    EventWorkshops in Conjunction with the 23rd International Conference on Data Engineering - ICDE 2007 - Istanbul, Turkey
    Duration: Apr 15 2007Apr 20 2007

    Publication series

    NameProceedings - International Conference on Data Engineering
    ISSN (Print)1084-4627


    ConferenceWorkshops in Conjunction with the 23rd International Conference on Data Engineering - ICDE 2007

    ASJC Scopus subject areas

    • Software
    • Signal Processing
    • Information Systems


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