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  1. Hadoop Map/Reduce
  2. MAPREDUCE-1608

Allow users to do speculative execution of a task manually

    Details

    • Type: New Feature
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: None
    • Labels:
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      Description

      Speculative execution improves the latency of the job. Sometimes the job has few very slow reducers. Spending a little more resource on speculative tasks can improve the latency a lot. It will be nice that the users can manually select one task and force the speculative execution on that task just like we can manually kill/fail task.

      The proposal is add link says "speculate" in taskdetails.jsp page where we do "kill/fail".

      Thoughts?

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            • Assignee:
              schen Scott Chen
              Reporter:
              schen Scott Chen
            • Votes:
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              Dates

              • Created:
                Updated: