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  1. Hadoop Map/Reduce
  2. MAPREDUCE-4592

Collect statistics on key distributions/samples in intermediate data

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    • Improvement
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
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    • task
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    Description

      Some jobs would benefit from statistics about the key distribution of intermediate data, including sampling for jobs implementing a total-order in the job. These data can inform a policy for handling skew.

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          is part of

          New Feature - A new feature of the product, which has yet to be developed. MAPREDUCE-4584 Umbrella: Preemption and restart of MapReduce tasks

          • Major - Major loss of function.
          • Open

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              Unassigned Unassigned
              cdouglas Christopher Douglas
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                Created:
                Updated: