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Posted to issues@spark.apache.org by "Shushant Arora (JIRA)" <ji...@apache.org> on 2015/12/25 09:28:49 UTC

[jira] [Created] (SPARK-12524) Group by key in a pairrdd without any shuffle

Shushant Arora created SPARK-12524:
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             Summary: Group by key in a pairrdd without any shuffle
                 Key: SPARK-12524
                 URL: https://issues.apache.org/jira/browse/SPARK-12524
             Project: Spark
          Issue Type: Improvement
          Components: Build, Java API
    Affects Versions: 1.5.2
            Reporter: Shushant Arora


In a PairRDD<K,V>. When we are all values of same key are in same partition and want to perform group by key locally and no reduce/aggregation operation afterwords just further tranformation on grouped rdd. There is no facility for that. We have to perform shuffle which is costly.



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