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https://issues.apache.org/jira/browse/MAPREDUCE-5591?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Arnab Guin updated MAPREDUCE-5591:
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Attachment: k-ranking.tgz
> 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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