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  1. Hive
  2. HIVE-8042

Optionally allow move tasks to run in parallel

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Details

    • Improvement
    • Status: Closed
    • Major
    • Resolution: Fixed
    • None
    • 0.14.0
    • None
    • None

    Description

      hive.exec.parallel allows one to run different stages of a query in parallel. However that applies only to map-reduce tasks. When using large multi insert queries there are many MoveTasks that are all executed in sequence on the client. There's no real reason for that - they could be run in parallel as well (i.e.: the stage graph captures the dependencies and knows which tasks can happen in parallel).

      Attachments

        1. HIVE-8042.1.patch
          29 kB
          Gunther Hagleitner
        2. HIVE-8042.2.patch
          28 kB
          Gunther Hagleitner
        3. HIVE-8042.3.patch
          27 kB
          Gunther Hagleitner

        Issue Links

          breaks

          Bug - A problem which impairs or prevents the functions of the product. HIVE-9665 Parallel move task optimization causes race condition

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          relates to

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-14204 Optimize loading dynamic partitions

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

          Activity

            People

              hagleitn Gunther Hagleitner
              hagleitn Gunther Hagleitner
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              Dates

                Created:
                Updated:
                Resolved: