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  1. Lustre
  2. LU-12926

lfs mkdir -c can cause repeated MDT indexes

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Details

    • Bug
    • Resolution: Cannot Reproduce
    • Major
    • None
    • Lustre 2.13.0, Lustre 2.12.3
    • 3
    • 9223372036854775807

    Description

      For a large (e.g. 5) number of MDTs, doing the following:

      lfs mkdir -c 5 dir/

      Can yield an MDT distribution of: 4, 0, 4, 1, 2 or other distributions with repeated and missing mdt indexes.

      Manually specifying mdts via -i works as expected.

      I believe this is due to the "auto_distributed" logic in lustre/utils/lfs.c::lfs_setdirstripe()

      Attachments

        Issue Links

          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-17756 tunable limit for MDT overstripe factor

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

          New Feature - A new feature of the product, which has yet to be developed. LU-12273 DNE3: Metadata overstriping

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

          Activity

            People

              laisiyao Lai Siyao
              utopiabound Nathaniel Clark
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              Dates

                Created:
                Updated:
                Resolved: