[Nutch Wiki] Update of "nutch-0.8-dev/bin/nutch generate" by JeffRitchie

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The following page has been changed by JeffRitchie:
http://wiki.apache.org/nutch/nutch-0%2e8-dev/bin/nutch_generate

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= "generate" is an alias for "org.apache.nutch.crawl.Generator" =

== Generates a new Fetcher Segment from the Crawl Database ==

=== Usage ===
 nutch-0.8-dev/bin/nutch org.apache.nutch.crawl.Generator <crawldb> <segments_dir> [-topN <num>] [-numFetchers <fetchers>] [-adddays <days>]

  '''<crawldb>:''' Path to the crawldb directory.[[BR]]
  '''<segments_dir>:''' Path to the directory where the Fetcher Segments are created.[[BR]]
  '''[-topN <num>]:''' Selects the top ''<num>'' ranking URLs for this segment. Default: ''Long.MAX_VALUE''[[BR]]
  '''[-numFetchers <fetchers>]:''' The number of fetch partitions. Default: ''Configuration key -> mapred.map.tasks -> 1''[[BR]]
  '''[-adddays <days>]:''' Adds <days> to the current time to facilitate crawling urls already fetched sooner then ''db.default.fetch.interval''. Default: ''0''[[BR]]

=== Configuration Files ===
 hadoop-default.xml[[BR]]
 hadoop-site.xml[[BR]]
 nutch-default.xml[[BR]]
 nutch-site.xml[[BR]]

=== Other Files ===
 None.

=== Caveats and Notes ===
 None.

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