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  1. Lustre
  2. LU-12325

Downgrade lock mode for DOM files when DOM bit gone

    Details

    • Type: Improvement
    • Status: Open
    • Priority: Major
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Labels:
    • Rank (Obsolete):
      9223372036854775807

      Description

      The DOM lock bit is taken opportunistically at open to improve possible read/write access but it uses PW lock mode and can be combined with other lock bits. The proposed improvements are:
      1. when file is closed and there were no read/write, drop DOM bit and downgrade lock mode to less strict lock mode (CR/CW)
      2. if there was write then write data on close (LU-11428) and also downgrade lock mode to PR
      3. if DOM bit is dropped and there are other bits remains in lock - downgrade lock mode too

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              • Assignee:
                tappro Mikhail Pershin
                Reporter:
                tappro Mikhail Pershin
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                Dates

                • Created:
                  Updated: