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  1. Flink
  2. FLINK-2237 Add hash-based Aggregation
  3. FLINK-3480

Add hash-based strategy for ReduceFunction

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    Details

    • Type: Sub-task
    • Status: Closed
    • Priority: Major
    • Resolution: Won't Do
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Runtime / Task
    • Labels:
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      Description

      This issue is related to FLINK-3477.
      While FLINK-3477 proposes to add hash-based combine strategy for ReduceFunction, this issue aims to add a hash-based strategy for the final aggregation.

      This will need again a special hash-table aggregation which allows for in-place updates and append updates. However, it also needs to support spilling to disk in case of too tight memory budgets.

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            • Assignee:
              Unassigned
              Reporter:
              fhueske Fabian Hueske
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              • Created:
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