Hadoop Streaming
Hadoop streaming is a utility that comes with the Hadoop distribution. The utility allows you to create and run map/reduce jobs with any executable or script as the mapper and/or the reducer. For example: $HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/hadoop-streaming.jar \ -input myInputDirs \ -output myOutputDir \ -mapper /bin/cat \ -reducer /bin/wc In the above example, both the mapper and the reduce
HadoopStreaming - HADOOP2 - Apache Software Foundation
Hadoop Streaming is a utility which allows users to create and run jobs with any executables (e.g. shell utilities) as the mapper and/or the reducer. Usage: $HADOOP_HOME/bin/hadoop jar $HADOOP_HOME/mapred/contrib/streaming/hadoop-streaming.jar [options] Options: -input <path> DFS input file(s) for the Map step -output <path> DFS output directory for the Reduce step -mapper <cmd|JavaClassName> The
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