Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-10191

ORC: Cleanup writer per-row synchronization

    XMLWordPrintableJSON

    Details

    • Release Note:
      Remove per-row synchronization from ORC WriterImpl

      Description

      ORC writers were originally meant to be thread-safe, but in the present day implementation each ORC writer is entirely share-nothing which converts most of the synchronized blocks in ORC as entirely uncontested locks.

      These uncontested locks prevent the JVM from inlining/optimizing these methods, while adding no extra thread-safety to the ORC writers.

        Attachments

        1. HIVE-10191.5.patch
          8 kB
          Gopal Vijayaraghavan
        2. HIVE-10191.4.patch
          8 kB
          Gopal Vijayaraghavan
        3. HIVE-10191.3.patch
          8 kB
          Gopal Vijayaraghavan
        4. HIVE-10191.2.patch
          9 kB
          Gopal Vijayaraghavan
        5. HIVE-10191.1.patch
          8 kB
          Gopal Vijayaraghavan

          Issue Links

            Activity

              People

              • Assignee:
                gopalv Gopal Vijayaraghavan
                Reporter:
                gopalv Gopal Vijayaraghavan
              • Votes:
                0 Vote for this issue
                Watchers:
                3 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: