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  1. Hive
  2. HIVE-1248

better tuning for number of reducers

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Details

    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Query Processor
    • None

    Description

      Currently, the following parameter: BYTESPERREDUCER("hive.exec.reducers.bytes.per.reducer", (long) (1000 * 1000 * 1000)),

      decides the number of reducers for a given query - it is same for all map-reduce jobs of the query. It would be good to give more flexibility to the
      user, and provide a way so that they can determine number of reducers for each map-reduce job

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          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-17004 Calculating Number Of Reducers Looks At All Files

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              namit Namit Jain
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              Dates

                Created:
                Updated: