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  1. Lustre
  2. LU-9161

mount_utils_ldiskfs.c is_feature_enabled() should pass '-c' to debugfs

Details

    • Bug
    • Resolution: Fixed
    • Minor
    • Lustre 2.10.0
    • None
    • 3
    • 9223372036854775807

    Description

      The meta_bg feature unfortunately fragments the group descriptor block across the whole filesystem, rather than continuously at the start of the device. This causes a large amount of seeking (at least 32768 seeks for a 256TB filesystem).

      Skipping the loading of inode tables and bitmaps via -c will avoid reading many GB of data.

      Attachments

        Issue Links

          is related to

          Question/Request - A product question or request LU-9160 Very slow mount of 300TB+ ldiskfs volume

          • Major - Major loss of function.
          • Resolved

          Activity

            [LU-9161] mount_utils_ldiskfs.c is_feature_enabled() should pass '-c' to debugfs
            pjones Peter Jones made changes -
            Fix Version/s New: Lustre 2.10.0 [ 12204 ]
            Resolution New: Fixed [ 1 ]
            Status Original: Open [ 1 ] New: Resolved [ 5 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-9160 [ LU-9160 ]
            adilger Andreas Dilger made changes -
            Description New: The {{meta_bg}} feature unfortunately fragments the group descriptor block across the whole filesystem, rather than continuously at the start of the device. This causes a large amount of seeking (at least 32768 seeks for a 256TB filesystem).

            Skipping the loading of inode tables and bitmaps via {{-c}} will avoid reading many GB of data.
            adilger Andreas Dilger made changes -
            Labels New: easy
            jhammond John Hammond made changes -
            Link New: This issue is related to SEA-333 [ SEA-333 ]
            jhammond John Hammond created issue -

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              wc-triage WC Triage
              jhammond John Hammond
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              Dates

                Created:
                Updated:
                Resolved: