Details

    • Type: New Feature New Feature
    • Status: Resolved
    • Priority: Major Major
    • Resolution: Duplicate
    • Affects Version/s: 3.0.0
    • Fix Version/s: None
    • Component/s: None
    • Labels:
      None
    • Target Version/s:

      Description

      The current implementation of sort in MapReduce is cooperated by Map side sort and Reduce side merge. MAPREDUCE-2454 provided pluggable sort at the Map side currently and pluggable shuffle at Reduce side, while no pluggable merger provided.

      Considering a general need of hash grouping and join, we may need to replace both the Map Sort and Reduce merge with a more light weight hash grouping alorithm. A general pluggable merge would help support this need.

        Issue Links

          Activity

          Arun C Murthy made changes -
          Status Open [ 1 ] Resolved [ 5 ]
          Resolution Duplicate [ 3 ]
          Jerry Chen made changes -
          Field Original Value New Value
          Link This issue is related to MAPREDUCE-2454 [ MAPREDUCE-2454 ]
          Jerry Chen created issue -

            People

            • Assignee:
              Unassigned
              Reporter:
              Jerry Chen
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