hadoop Introduction to MapReduce
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Syntax
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To run the example, the command syntax is:
bin/hadoop jar hadoop-*-examples.jar wordcount [-m <#maps>] [-r <#reducers>] <in-dir> <out-dir> -
To copy data into HDFS(from local):
bin/hadoop dfs -mkdir <hdfs-dir> //not required in hadoop 0.17.2 and later bin/hadoop dfs -copyFromLocal <local-dir> <hdfs-dir>
Remarks
Word Count program using MapReduce in Hadoop.
