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  1. Lustre
  2. LU-14134

reduce credits for new writing potentially

Details

    • Improvement
    • Resolution: Fixed
    • Minor
    • Lustre 2.14.0
    • None
    • None
    • 9223372036854775807

    Description

      For new writting, Lustre reserve credits in worst cases, eg for 1M write, we need reserve more than 500 credits.

      This means we need much more journal space than data for each write, which means we need large journal to reach good performance.

      One of potential way to improve this could be we allow transaction restart for write commit
      case.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-14729 read-only remount due to transaction error in __ldiskfs_handle_dirty_metadata

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Bug - A problem which impairs or prevents the functions of the product. LU-9985 osd_read_prep() ignores errors from osd_ldiskfs_map_inode_pages()

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

          Bug - A problem which impairs or prevents the functions of the product. LU-14187 LU-14134 causes many racer timeouts

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

          Bug - A problem which impairs or prevents the functions of the product. LU-14304 parallel-scale-nfsv3 test racer_on_nfs hangs

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-14641 per extents bytes allocation stats

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

          Activity

            [LU-14134] reduce credits for new writing potentially
            pjones Peter Jones added a comment -

            Landed for 2.14

            pjones Peter Jones added a comment - Landed for 2.14
            gerrit Gerrit Updater added a comment -

            Oleg Drokin (green@whamcloud.com) merged in patch https://review.whamcloud.com/40626/
            Subject: LU-14134 osd-ldiskfs: reduce credits for new writing
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: 0271b17b80a82c132076a839385d3d8d8344c849

            gerrit Gerrit Updater added a comment - Oleg Drokin (green@whamcloud.com) merged in patch https://review.whamcloud.com/40626/ Subject: LU-14134 osd-ldiskfs: reduce credits for new writing Project: fs/lustre-release Branch: master Current Patch Set: Commit: 0271b17b80a82c132076a839385d3d8d8344c849
            gerrit Gerrit Updater added a comment -

            Wang Shilong (wshilong@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/40626
            Subject: LU-14134 osd-ldiskfs: reduce credits for new writting
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 90fb6ddc38265c7025676328d9eead4d6a3d3e51

            gerrit Gerrit Updater added a comment - Wang Shilong (wshilong@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/40626 Subject: LU-14134 osd-ldiskfs: reduce credits for new writting Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 90fb6ddc38265c7025676328d9eead4d6a3d3e51

            People

              wshilong Wang Shilong (Inactive)
              wshilong Wang Shilong (Inactive)
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              Dates

                Created:
                Updated:
                Resolved: