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The "bin/nutch readdb" page has been changed by kiranchitturi: http://wiki.apache.org/nutch/bin/nutch%20readdb New page: Readdb is an alias for org.apache.nutch.crawl.CrawlDbReader The CrawlDbReader implements all the read-only parts of accessing our web database. It provides us with a read utility for the crawldb. Usage: {{{ bin/nutch readdb <crawldb> (-stats | -dump <out_dir> | -topN <nnnn> <out_dir> [<min>] | -url <url>) }}} '''<crawldb>''': The location of the crawldb directory we wish to read and obtain information from. '''-stats''': This prints the overall statistics to System.out. '''-dump <out_dir>''': Enables us to dump the whole crawldb to a text file in any <out_dir> we wish to specify. '''[-regex <expr>]''': filter records with a regular expression '''[-status <status>]''': filter records by CrawlDatum status '''-topN <nnnn> <out_dir> [<min>]''': This dumps the top <nnnn> urls sorted by score relevance to any <out_dir> we wish to specify. If the [<min>] parameter is passed in the command the reader will skip records with scores below this particluar value. This can significantly improve retrieval performance of statistics or crawldb dump results. '''-url <url>''': This simply prints information of any particular <url> to System.out. CommandLineOptions
