Streaming should have a built in identity mapper
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Key: HADOOP-809
URL: http://issues.apache.org/jira/browse/HADOOP-809
Project: Hadoop
Issue Type: Improvement
Components: contrib/streaming
Reporter: arkady borkovsky
Currently, in order to merge 2 inputs , or to feed the output of type-changing
reduce to another reduce, one needs to use
-mapper /bin/cat
Streaming already has identity reducer implemented.
Adding identity mapper will make it more conceptually clean, more efficient,
and hopefully more reliable.
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