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  1. Lustre
  2. LU-13786

Take server-side locks for direct i/o

Details

    • Improvement
    • Resolution: Duplicate
    • Major
    • None
    • None
    • None
    • 3
    • 18,801
    • 9223372036854775807

    Description

      Trying to investigate an idea that client side locks are not needed for direct i/o, formally, there is no client cache to protect, and client locks are expanded at server to the maximum extent while server-side locks are not (part of lock-ahead patch).

      The improvement was initially implemented for Luste-1.8 (https://bugzilla.lustre.org/show_bug.cgi?id=18801) and lost during client re-write (CLIO).

      Attachments

        Issue Links

          duplicates

          Improvement - An improvement or enhancement to an existing feature or task. LU-4198 Improve IO performance when using DIRECT IO using libaio

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-12916 allow small/unaligned writes into writeback cache if not O_SYNC

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

          Activity

            [LU-13786] Take server-side locks for direct i/o
            zam Alexander Zarochentsev added a comment -

            Closing as a dup of LU-4198.

            zam Alexander Zarochentsev added a comment - Closing as a dup of LU-4198 .
            gerrit Gerrit Updater added a comment -

            Alexander Zarochentsev (alexander.zarochentsev@hpe.com) uploaded a new patch: https://review.whamcloud.com/39363
            Subject: LU-13786 osc: server locks for direct i/o
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 0a6e5c948c95ba55cd66ae00f67a7517e0cc40e5

            gerrit Gerrit Updater added a comment - Alexander Zarochentsev (alexander.zarochentsev@hpe.com) uploaded a new patch: https://review.whamcloud.com/39363 Subject: LU-13786 osc: server locks for direct i/o Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 0a6e5c948c95ba55cd66ae00f67a7517e0cc40e5

            People

              wc-triage WC Triage
              zam Alexander Zarochentsev
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              Dates

                Created:
                Updated:
                Resolved: