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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "HadoopMapReduce" by TeppoKurki
Date Tue, 30 May 2006 07:34:37 GMT
Dear Wiki user,

You have subscribed to a wiki page or wiki category on "Lucene-hadoop Wiki" for change notification.

The following page has been changed by TeppoKurki:

  file (''append phase''). The file is then merge sorted so that the key-value pairs for
  a given key are contiguous (''sort phase''). This makes the actual reduce operation simple:
the file is
  read sequentially and the values are passed to the reduce method
- with an iterator reading the input input file until the next key
+ with an iterator reading the input file until the next key
  value is encountered. See [http://svn.apache.org/viewcvs.cgi/lucene/hadoop/trunk/src/java/org/apache/hadoop/mapred/ReduceTask.java?view=markup
 ReduceTask] for details.
  In the end the output will consist of one output file per Reduce

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