hadoop/hadoop-tools/hadoop-datajoin/src/test/java/README.txt

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*** Input Files (Note: tab-separated columns) ***
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[:~]$ cat datajoin/input/A
A.a11   A.a12
A.a21   A.a22
B.a21   A.a32
A.a31   A.a32
B.a31   A.a32

[:~]$ cat datajoin/input/B
A.a11   B.a12
A.a11   B.a13
B.a11   B.a12
B.a21   B.a22
A.a31   B.a32
B.a31   B.a32


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*** Invoke SampleDataJoin ***
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[:~]$ $HADOOP_PREFIX/bin/hadoop jar hadoop-datajoin-examples.jar org.apache.hadoop.contrib.utils.join.DataJoinJob datajoin/input datajoin/output Text 1 org.apache.hadoop.contrib.utils.join.SampleDataJoinMapper org.apache.hadoop.contrib.utils.join.SampleDataJoinReducer org.apache.hadoop.contrib.utils.join.SampleTaggedMapOutput Text
Using TextInputFormat: Text
Using TextOutputFormat: Text
07/06/01 19:58:23 INFO mapred.FileInputFormat: Total input paths to process : 2
Job job_kkzk08 is submitted
Job job_kkzk08 is still running.
07/06/01 19:58:24 INFO mapred.LocalJobRunner: collectedCount    5
totalCount      5

07/06/01 19:58:24 INFO mapred.LocalJobRunner: collectedCount    6
totalCount      6

07/06/01 19:58:24 INFO datajoin.job: key: A.a11 this.largestNumOfValues: 3
07/06/01 19:58:24 INFO mapred.LocalJobRunner: actuallyCollectedCount    5
collectedCount  7
groupCount      6
 > reduce


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*** Output File ***
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[:~]$ cat datajoin/output/part-00000  
A.a11   A.a12   B.a12
A.a11   A.a12   B.a13
A.a31   A.a32   B.a32
B.a21   A.a32   B.a22
B.a31   A.a32   B.a32