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  1. Spark
  2. SPARK-9850 Adaptive execution in Spark
  3. SPARK-11733

Allow shuffle readers to request data from just one mapper

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    • Type: Sub-task
    • Status: Resolved
    • Priority: Major
    • Resolution: Incomplete
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Spark Core, SQL
    • Labels:

      Description

      This is needed to do broadcast joins. Right now the shuffle reader interface takes a range of reduce IDs but fetches from all maps.

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            • Assignee:
              Unassigned
              Reporter:
              matei Matei Zaharia
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                Updated:
                Resolved: