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  1. Lustre
  2. LU-10176 Data-on-MDT phase II
  3. LU-10808

DoM: component end should align with dom_stripesize

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    Details

    • Type: Technical task
    • Status: Resolved
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: Lustre 2.11.0
    • Fix Version/s: Lustre 2.12.0
    • Labels:
    • Rank (Obsolete):
      9223372036854775807

      Description

      If the DoM component extent_end is set larger than the MDT dom_stripesize (via lfs setstripe -Eextent_end -L mdt ) then this currently generates an error.  Since users do not have any easy way to determine the dom_stripesize on the MDT, and it may in fact be different on a per-MDT basis (e.g. if MDT0000 sets dom_stripesize=0 because it was formatted before DoM, or it is adjusted automatically by the MDS when the MDT is nearly full).  This complicates DoM usage for users (imagine a striped directory that has different DoM size limits for the MDTs it is striped over).

      The MDS should automatically adjust the component extent_end to match the MDT dom_stripesize, and if dom_stripesize=0 then the DoM component should be removed.

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              Assignee:
              tappro Mikhail Pershin
              Reporter:
              adilger Andreas Dilger
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                Updated:
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