Examples codes demonstrating features in Hadoop eco-system.

cd /usr/local/hadoop hadoop dfs -mkdir ~/wordcount/input sudo vi file01 sudo vi file02 bin/hadoop dfs -copyFromLocal file01 /home/impadmin/wordcount/input/ bin/hadoop dfs -copyFromLocal file02 /home/impadmin/wordcount/input/ bin/hadoop dfs -ls /home/impadmin/wordcount/input/

Found 2 items -rw-r--r-- 1 impadmin supergroup 0 2012-05-08 14:51 /home/impadmin/wordcount/input/file01 -rw-r--r-- 1 impadmin supergroup 0 2012-05-08 14:51 /home/impadmin/wordcount/input/file02

bin/hadoop jar ~/development/hadoop-examples/target/hadoop-examples-1.0.jar com.impetus.code.examples.hadoop.mapred.wordcount.WordCount /home/impadmin/wordcount/input /home/impadmin/wordcount/output bin/hadoop dfs -ls /home/impadmin/wordcount/output/

Found 3 items -rw-r--r-- 1 impadmin supergroup 0 2012-05-08 15:23 /home/impadmin/wordcount/output/_SUCCESS drwxr-xr-x - impadmin supergroup 0 2012-05-08 15:22 /home/impadmin/wordcount/output/_logs -rw-r--r-- 1 impadmin supergroup 41 2012-05-08 15:23 /home/impadmin/wordcount/output/part-00000

bin/hadoop dfs -cat /home/impadmin/wordcount/output/part-00000

Bye 1 Goodbye 1 Hadoop 2 Hello 2 World 2

http://code.google.com/p/hadoop-map-reduce-examples