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CWJ 3 P

CWJ 3 P. Chris Waterman Jeff Phillips Jason Jenks. Overall Crawler Design. Workers. Database. Mp3 Cataloger. Controllers. Downloaded Pages. Parser/ Analyzer. URL Frontier. URLs. Web Front-end. Problems Discovered. 64 Megabyte heap

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CWJ 3 P

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  1. CWJ3P Chris Waterman Jeff Phillips Jason Jenks

  2. Overall Crawler Design Workers Database Mp3 Cataloger Controllers Downloaded Pages Parser/ Analyzer URL Frontier URLs Web Front-end

  3. Problems Discovered • 64 Megabyte heap • Tendency to get “slammed” with links to the same server • Memory Leaks ??? • HTTP Timeouts

  4. Solutions • Disk-based data-structures w/ caches • Limit worker queue’s size • Asynchronous download of URLs

  5. Things To Do Differently • Different language (c++) • Better way to keep workers working • Distributed computing • Phrase searching support

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