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  1. Spark
  2. SPARK-4366 Aggregation Improvement
  3. SPARK-3056

Sort-based Aggregation

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Details

    • Sub-task
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • None
    • 1.5.0
    • SQL
    • None

    Description

      Currently, SparkSQL only support the hash-based aggregation, which may cause OOM if too many identical keys in the input tuples.

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        is blocked by

        Improvement - An improvement or enhancement to an existing feature or task. SPARK-2926 Add MR-style (merge-sort) SortShuffleReader for sort-based shuffle

        • Major - Major loss of function.
        • Resolved
        is duplicated by

        Improvement - An improvement or enhancement to an existing feature or task. SPARK-2873 Support disk spilling in Spark SQL aggregation

        • Blocker - Blocks development and/or testing work, production could not run
        • Resolved
        links to

        Pull request #7458 [Github] Pull Request #7458 (yhuai)

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          People

            yhuai Yin Huai
            chenghao Cheng Hao
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            Dates

              Created:
              Updated:
              Resolved:

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