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  1. Lustre
  2. LU-14305

add persistent tuning for mb_c3_threshold

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Details

    • Improvement
    • Resolution: Fixed
    • Minor
    • Lustre 2.15.0
    • None
    • 9223372036854775807

    Description

      Allow the ldiskfs mb_c[123]_threshold parameters to be set persistently. Currently, they are only in /sys/fs/ldiskfs/<dev>/mb_c[123]_threshold and are not configurable via "lctl set_param", sysctl, or other (known to me) tuning mechanism.

      While the upstream ext4 developers seem to frown upon mount options, this does provide a mechanism (via /etc/fstab and/or tune2fs -E mount_opts=<opts>) for setting filesystems parameters permanently on a per-filesystem basis.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-14438 backport ldiskfs mballoc patches

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-12103 Improve block allocation for large partitions

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

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              adilger Andreas Dilger
              adilger Andreas Dilger
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              Dates

                Created:
                Updated:
                Resolved: