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  1. Hive
  2. HIVE-3841

Sampling in previous MR for range partitioning of next RS

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    Details

    • Type: Improvement
    • Status: Open
    • Priority: Minor
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Query Processor
    • Labels:
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      Description

      Currently hive enforces single reducer for order by clause, which can be performance bottleneck.

      If sampling could be done on ordering key at previous MR stage, multiple reducers could be assigned for it.

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        1. HIVE-3841.D7671.1.patch
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              • Assignee:
                navis Navis Ryu
                Reporter:
                navis Navis Ryu
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                Dates

                • Created:
                  Updated: