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  1. Lustre
  2. LU-11473

Add ‘lfs getsom’ to the lfs man page

    Details

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

      Description

      The Lazy Size on MDT feature added the flag “getsom” to lfs that will collect lazy stat information for a file. The lfs man page needs to be updated to include this flag.

      Here’s what I can gather from the LSOM test plan about ‘lfs getsom’:

      The lfs getsom command lists file attributes that are stored on the MDS. lfs getsom is called with the full path and file name for a file on the Lustre file system. If no flags are used, then all file attributes stored on the MDS will be shown.

      Usage: lfs getsom [-s] [-b] [-f] <path>

      Flags for lfs getsom are:

      Flag Description
      -s Only show the size value of the SOM data for a given file. This is an optional flag.
      -b Only show the blocks value of the SOM data for a given file. This is an optional flag.
      -f Only show the flag value of the SOM data for a given file. This is an optional flag.
      Valid flags are:
      SOM_FL_UNKNOWN = 0x0000 - Unknown or no SoM data, must get size from OSTs.

      SOM_FL_STRICT = 0x0001 - Known strictly correct, FLR or DoM file (SoM guaranteed).

      SOM_FL_STALE = 0x0002 - Known stale - was right at some point in the past, but it is known (or likely) to be incorrect now (e.g. opened for write).

      SOM_FL_LAZY = 0x0004 - Approximate, may never have been strictly correct, need to sync SOM data to achieve eventual consistency.

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              • Assignee:
                jamesanunez James Nunez
                Reporter:
                jamesanunez James Nunez
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                • Created:
                  Updated:
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