Uploaded image for project: 'Hadoop Common'
  1. Hadoop Common
  2. HADOOP-5572

The map progress value should have a separate phase for doing the final sort.

VotersWatch issueWatchersCreate sub-taskLinkCloneUpdate Comment AuthorReplace String in CommentUpdate Comment VisibilityDelete Comments
    XMLWordPrintableJSON

    Details

    • Type: Improvement
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 0.21.0
    • Component/s: None
    • Labels:
      None
    • Hadoop Flags:
      Reviewed

      Description

      Currently, the final spill and sort doesn't record any progress while it runs, leading to the perception that the map is done, but "stuck".

      This patch reserves 33.3% of map task's progress to sort by dividing map task in to 2 phases. Also makes the progress of sort phase(merges) work, both in map side and reduce side.

        Attachments

        1. HADOOP-5572.patch
          33 kB
          Ravi Gummadi
        2. HADOOP-5572.v1.1.patch
          36 kB
          Ravi Gummadi
        3. HADOOP-5572.v1.2.patch
          38 kB
          Ravi Gummadi
        4. HADOOP-5572.v1.3.patch
          39 kB
          Ravi Gummadi
        5. HADOOP-5572.v1.4.patch
          41 kB
          Ravi Gummadi
        6. HADOOP-5572.v1.patch
          35 kB
          Ravi Gummadi

        Issue Links

          Activity

            People

            • Assignee:
              ravidotg Ravi Gummadi
              Reporter:
              omalley Owen O'Malley

              Dates

              • Created:
                Updated:
                Resolved:

                Issue deployment