Details

    • Type: Improvement Improvement
    • Status: Closed
    • Priority: Major Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.18.0
    • Component/s: None
    • Labels:
      None
    • Release Note:
      Improved shuffle so that all fetched map-outputs are kept in-memory before being merged by stalling the shuffle so that the in-memory merge executes and frees up memory for the shuffle.

      Description

      This is intended to be a meta-issue to track various improvements to shuffle/merge in the reducer.

      1. HADOOP-3366_2_20080606.patch
        16 kB
        Arun C Murthy
      2. HADOOP-3366_2_20080606.patch
        15 kB
        Arun C Murthy
      3. 3366.reducetask.patch
        3 kB
        Devaraj Das
      4. HADOOP-3366_0_20080605.patch
        10 kB
        Arun C Murthy
      5. ifile.patch
        9 kB
        Arun C Murthy
      6. 3366.1.patch
        9 kB
        Devaraj Das
      7. 3366.1.patch
        9 kB
        Devaraj Das

        Issue Links

          Activity

          Owen O'Malley made changes -
          Component/s mapred [ 12310690 ]
          Nigel Daley made changes -
          Status Resolved [ 5 ] Closed [ 6 ]
          Robert Chansler made changes -
          Release Note Shuffle has been improved to ensure that all fetched map-outputs are kept in-memory before being merged. This is accomplished by stalling the shuffle so that the in-memory merge executes and frees up memory for the shuffle. Improved shuffle so that all fetched map-outputs are kept in-memory before being merged by stalling the shuffle so that the in-memory merge executes and frees up memory for the shuffle.
          Arun C Murthy made changes -
          Release Note Shuffle has been improved to ensure that all fetched map-outputs are kept in-memory before being merged. This is accomplished by stalling the shuffle so that the in-memory merge executes and frees up memory for the shuffle.
          Arun C Murthy made changes -
          Status Patch Available [ 10002 ] Resolved [ 5 ]
          Resolution Fixed [ 1 ]
          Arun C Murthy made changes -
          Status Open [ 1 ] Patch Available [ 10002 ]
          Arun C Murthy made changes -
          Attachment HADOOP-3366_2_20080606.patch [ 12383611 ]
          Arun C Murthy made changes -
          Attachment HADOOP-3366_2_20080606.patch [ 12383609 ]
          Devaraj Das made changes -
          Attachment 3366.reducetask.patch [ 12383563 ]
          Arun C Murthy made changes -
          Attachment HADOOP-3366_0_20080605.patch [ 12383540 ]
          Arun C Murthy made changes -
          Attachment ifile.patch [ 12382292 ]
          Devaraj Das made changes -
          Attachment 3366.1.patch [ 12382170 ]
          Devaraj Das made changes -
          Attachment 3366.1.patch [ 12382167 ]
          Arun C Murthy made changes -
          Link This issue depends upon HADOOP-3365 [ HADOOP-3365 ]
          Arun C Murthy made changes -
          Link This issue depends upon HADOOP-3297 [ HADOOP-3297 ]
          Arun C Murthy made changes -
          Field Original Value New Value
          Link This issue depends upon HADOOP-2095 [ HADOOP-2095 ]
          Arun C Murthy created issue -

            People

            • Assignee:
              Arun C Murthy
              Reporter:
              Arun C Murthy
            • Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved:

                Development