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  1. Spark
  2. SPARK-22537

Aggregation of map output statistics on driver faces single point bottleneck

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.2.0
    • Fix Version/s: 2.3.0
    • Component/s: Spark Core
    • Labels:
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      Description

      In adaptive execution, the map output statistics of all mappers will be aggregated after a stage is successfully executed. Driver takes the aggregation job while it will get slow when the number of mapper * shuffle partitions is large.

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            • Assignee:
              chenzhaoguo-intel Chenzhao Guo
              Reporter:
              chenzhaoguo-intel Chenzhao Guo
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              • Created:
                Updated:
                Resolved: