Hadoop ==========

Run Hadoop examples

Verify contents of HDFS


hadoop fs -ls /

Pi job


hadoop jar /usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar pi 10 100

Wordcount job


hadoop fs -mkdir input
hadoop fs -put /etc/hadoop/conf/*.xml input
hadoop jar /usr/lib/hadoop-0.20-mapreduce/hadoop-examples.jar wordcount input output

By the way, if you re-run this job, it will fail. Why is that?