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  1. Lustre
  2. LU-14146 Massive directory metadata operation performance decrease
  3. LU-15528

downgrade remote PW/EX lock taken in distributed transactions to COS mode

Details

    • Technical task
    • Resolution: Unresolved
    • Minor
    • None
    • None
    • None
    • 9223372036854775807

    Description

      downgrade remote PW/EX lock taken in distributed transactions to COS mode asynchronously after transaction stop, this can avoid commit-on-sharing by subsequent stat after distributed transactions (e.g. stat after striped directory creation).

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-14761 DNE2 Metadata degradation

          • Major - Major loss of function.
          • Open

          Technical task - A technical task. LU-17821 LMR1c: Improve DNE Distributed Transaction Performance

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

          Activity

            [LU-15528] downgrade remote PW/EX lock taken in distributed transactions to COS mode
            adilger Andreas Dilger made changes -
            Link New: This issue is related to EX-4451 [ EX-4451 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-14761 [ LU-14761 ]
            gerrit Gerrit Updater added a comment -

            "Lai Siyao <lai.siyao@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/46734
            Subject: LU-15528 mdt: enqueue newly created object locks in TXN mode
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 269d1897fdad4ba86de3e7710a9f1be4edd70a10

            gerrit Gerrit Updater added a comment - "Lai Siyao <lai.siyao@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/46734 Subject: LU-15528 mdt: enqueue newly created object locks in TXN mode Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 269d1897fdad4ba86de3e7710a9f1be4edd70a10
            laisiyao Lai Siyao added a comment -

            On second thought, this will make transaction dependency hard to detect, while the benefit is trivial, it's not worthwhile to implement this.

            laisiyao Lai Siyao added a comment - On second thought, this will make transaction dependency hard to detect, while the benefit is trivial, it's not worthwhile to implement this.
            laisiyao Lai Siyao created issue -

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              wc-triage WC Triage
              laisiyao Lai Siyao
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              Dates

                Created:
                Updated: