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  1. Lustre
  2. LU-12369

lfs setstripe causes MDS DLM lock callback during create

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

    Description

      Running lfs setstripe on a file with open(O_LOV_DELAY_CREATE) results in the MDS sending a DLM lock callback to the client for the newly-created file when ioctl(LL_IOC_LOV_SETSTRIPE) is called. I believe (but am not positive) that the callback is on the MDS_INODELOCK_LAYOUT bit of the inode.

      It doesn't make sense for the MDS to grant this bit to the client when O_LOV_DELAY_CREATE is used, since the file does not have a layout, and it is very likely that the client will call ioctl(LL_IOC_LOV_SETSTRIPE) immediately thereafter.

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          is related to

          Improvement - An improvement or enhancement to an existing feature or task. LU-11264 llapi_* routines demonstrate poor performance

          • Major - Major loss of function.
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              wc-triage WC Triage
              adilger Andreas Dilger
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                Created:
                Updated: