Arnab Guin created MAPREDUCE-5591:
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Summary: K-ranker
Key: MAPREDUCE-5591
URL: https://issues.apache.org/jira/browse/MAPREDUCE-5591
Project: Hadoop Map/Reduce
Issue Type: Task
Components: examples
Affects Versions: 2.2.0
Reporter: Arnab Guin
Attachments: k-ranking.tgz
Hi,
I recently wrote some code to find the max K integers corresponding a group.
Given one of more input files containing input lines of the following form:
"key",value
where key is a string
value is any integer
the program prints the top K elements corresponding to each key.
eg.
"a",1
"b",1
"a",2
"a",5
"b",17
"c",5
"b",6
if k = 2, the program prints
"a" [2,5]
"b" [6,17]
"c" [5]
Compile steps:
mvn clean
mvn package javadoc:javadoc
Run steps:
hadoop jar <ranking jar file> <main class> <K> <input directory> <output
directory>
eg. hadoop jar target/ranking-1.0-SNAPSHOT.jar org.ml.MaxKRanker 5 data/input
data/output
Wanted to know if there is a component (examples maybe) where the code can be
contributed. Also open to any suggestions for improvements.
Thanks,
Arnab
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