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  1. Lustre
  2. LU-17055

Implement FALLOC_FL_ZERO_RANGE

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    • Improvement
    • Resolution: Unresolved
    • Minor
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      It would be possible to implement the fallocate(FALLOC_FL_ZERO_RANGE) option for Lustre. This would need the OST thread performing the operation to get PW extent locks (and possibly the PW lock on the MDT for DOM files) in order to ensure the client cache is flushed, since it is modifying the file's data.

      For ldiskfs this would be passed down to the ldiskfs fallocate() call. I'm not sure whether ZFS supports zeroing blocks or not, but it could also be mapped to FALLOC_FL_PUNCH_HOLE to provide functionally equivalent behavior
      .

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          is cloned by

          Improvement - An improvement or enhancement to an existing feature or task. LU-17326 Implement FALLOC_FL_COLLAPSE_RANGE and FALLOC_FL_INSERT_RANGE

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

          Improvement - An improvement or enhancement to an existing feature or task. LUDOC-487 Document llite.*.fallocate_zero_blocks tunable

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

          New Feature - A new feature of the product, which has yet to be developed. LU-3606 Implement fallocate() support for ldiskfs Lustre

          • Major - Major loss of function.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. LU-14160 Implement fallocate FALLOCATE_FL_PUNCH_HOLE support

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

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              wc-triage WC Triage
              adilger Andreas Dilger
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              Dates

                Created:
                Updated: