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From Apache Wiki <wikidi...@apache.org>
Subject [Lucene-hadoop Wiki] Update of "Sort" by OwenOMalley
Date Wed, 28 Jun 2006 21:50:07 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 OwenOMalley:
http://wiki.apache.org/lucene-hadoop/Sort

------------------------------------------------------------------------------
  = Sort Example =
  
- '''Sort''' example is a trivial map/reduce program that does nothing other than use the
framework to fragment and sort the input data. The mapper is an Identity map, while the ruducer
is an Identity reducer. The input and output are Sequence files, of which both key and value
have a type of ''!BytesWritable''. 
+ The '''Sort''' example simply uses the map/reduce framework to sort the input directory
into the output directory. The inputs and outputs must be Sequence files where the keys and
values are !BytesWritable.
  
+ The mapper is the predefined !IdentityMapper and the ruducer is the predefined !IdentityReducer,
both of which just pass their inputs directly to the output. 
- To run the example, the command syntax is[[BR]]
- bin/hadoop org.apache.hadoop.examples.Sort [-m <#maps>] [-r <#reduces>] <in-dir>
<out-dir>
  
+ To run the program:
+ bin/hadoop jar hadoop-*-examples.jar sort [-m <#maps>] [-r <#reduces>] <in-dir>
<out-dir>
+ 

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