Uploaded image for project: 'Lustre'
  1. Lustre
  2. LU-18448

Read Directory page on open.

Details

    • Improvement
    • Resolution: Fixed
    • Major
    • Lustre 2.17.0
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      DoM provide a way to readahead for the pages on MDT, it save a time and rpc for MDT.
      Directory want to have similar option. It's very useful for small directories and increase a readdir speed for tree walk.

      100k directories with 100 files on each.

      1. find /mnt/kjlmo2/tests_dir -type d | wc -l
        102731

      unpatched.
      [root@c-lmo1005 ~]# time /bin/ls -1R /mnt/kjlmo2/tests_dir >& /dev/null
      real 1m48.603s

      patched
      [root@c-lmo1004 ~]# time /bin/ls -1R /mnt/kjlmo2/tests_dir >& /dev/null
      real 1m9.564s

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-18892 page_cache_alloc undefined on Ubuntu 24.04.2, kernel 6.11.0

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

          Activity

            [LU-18448] Read Directory page on open.
            green Oleg Drokin made changes -
            Link Original: This issue is related to LU-18987 [ LU-18987 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-18987 [ LU-18987 ]
            rread Robert Read made changes -
            Link New: This issue is related to LU-18892 [ LU-18892 ]
            pjones Peter Jones made changes -
            Resolution New: Fixed [ 1 ]
            Status Original: Open [ 1 ] New: Resolved [ 5 ]
            pjones Peter Jones added a comment -

            Merged for 2.17

            pjones Peter Jones added a comment - Merged for 2.17
            gerrit Gerrit Updater added a comment -

            "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/57069/
            Subject: LU-18448 llite: read dir on open
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: 4a14a51a8e000e05e6a3c0dae7bf64b8d43f8254

            gerrit Gerrit Updater added a comment - "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/57069/ Subject: LU-18448 llite: read dir on open Project: fs/lustre-release Branch: master Current Patch Set: Commit: 4a14a51a8e000e05e6a3c0dae7bf64b8d43f8254
            spitzcor Cory Spitz made changes -
            Priority Original: Critical [ 2 ] New: Major [ 3 ]
            gerrit Gerrit Updater added a comment -

            "Alexey Lyashkov <alexey.lyashkov@hpe.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/57069
            Subject: LU-18448 llite: read dir on open
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: cfeed43997abfbeb2508d14b9909ff9c8bf690b1

            gerrit Gerrit Updater added a comment - "Alexey Lyashkov <alexey.lyashkov@hpe.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/57069 Subject: LU-18448 llite: read dir on open Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: cfeed43997abfbeb2508d14b9909ff9c8bf690b1
            spitzcor Cory Spitz made changes -
            Fix Version/s New: Lustre 2.17.0 [ 16192 ]
            shadow Alexey Lyashkov created issue -

            People

              shadow Alexey Lyashkov
              shadow Alexey Lyashkov
              Votes:
              0 Vote for this issue
              Watchers:
              8 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: