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Browsing by Subject "kompresja bezstratna"

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  • thumbnail.journal.alt
    Item type:Article, Access status: Open Access ,
    Web log compression
    (Wydawnictwa AGH, 2007) Grabowski, Szymon; Deorowicz, Sebastian
    Web log data store client activity on a particular server, usually in form of one-line »hits« with information like the client's IP, date/ time, requested file or query, download size in bytes etc. Web logs of popular sites may grow at the pace of hundreds of megabytes a day, or even more. It makes sense to archive old logs, to analyze them further, e.g. for detecting attacks or other server abuse patterns. In this work we present a specialized lossless Apache web log preprocessor and test it with combination of several popular general-purpose compressors. The test results show the proposed transform improves the compression efficiency of general-purpose compressors on average by 65% in case of gzip and 52% in case of bzip2.