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  1. Kylin
  2. KYLIN-1677

Distribute source data by certain columns when creating flat table

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    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: v1.5.3
    • Component/s: Job Engine
    • Labels:
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      Description

      Inspired by KYLIN-1656, Kylin can distribute the source data by certain columns when creating the flat hive table; Then the data assigned to a mapper will have more similarity, more aggregation can happen at mapper side, and then less shuffle and reduce is needed.

      Columns can be used for the distribution includes: ultra high cardinality column, mandantory column, partition date/time column, etc.

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              • Assignee:
                shaofengshi Shao Feng Shi
                Reporter:
                shaofengshi Shao Feng Shi
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                • Created:
                  Updated:
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