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Posted to mapreduce-issues@hadoop.apache.org by "Faraz Ahmad (JIRA)" <ji...@apache.org> on 2013/03/29 11:25:16 UTC

[jira] [Created] (MAPREDUCE-5118) Inverted Index

Faraz Ahmad created MAPREDUCE-5118:
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             Summary: Inverted Index
                 Key: MAPREDUCE-5118
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5118
             Project: Hadoop Map/Reduce
          Issue Type: Sub-task
          Components: benchmarks
            Reporter: Faraz Ahmad
            Assignee: Faraz Ahmad


Inverted-Index takes a list of documents as input and generates word-to-document indexing. Map emits <word, docId> tuples with each word emitted once per docId. Reduce combines all tuples on key <word> and emits <word,list(docId)> tuples after removing duplicates.

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