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  1. Lustre
  2. LU-18529

FLSOM: Strict SOM for closed files

Details

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

    Description

      This ticket is for a possible feature called "file level SOM", which would use the file level replication layout IO control mechanisms to allow strict SOM for files not being actively written.

      This would apply the SOM after last close, using the FLR mechanisms to avoid the issues with evicted clients which normally prevent safe use of SOM.

      It's not clear if this would offer enough performance benefit to be worth the engineering effort, so the first step will be some benchmarking.

      Attachments

        Issue Links

          duplicates

          Improvement - An improvement or enhancement to an existing feature or task. LU-11962 File LSOM updates to store proper size via FLR for regular stat() usage

          • Major - Major loss of function.
          • Reopened

          Improvement - An improvement or enhancement to an existing feature or task. LU-14461 Convert LSOM with loose size consistency into a strong consistent version

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

          Activity

            [LU-18529] FLSOM: Strict SOM for closed files
            paf0186 Patrick Farrell added a comment -

            See LU-11962

            paf0186 Patrick Farrell added a comment - See LU-11962
            paf0186 Patrick Farrell added a comment -

            Nearly 6 years ago...  My.  All right, I'll close this one and move things over later.

            paf0186 Patrick Farrell added a comment - Nearly 6 years ago...  My.  All right, I'll close this one and move things over later.
            adilger Andreas Dilger added a comment -

            You already filed this as LU-11962 some time ago.

            adilger Andreas Dilger added a comment - You already filed this as LU-11962 some time ago.
            paf0186 Patrick Farrell added a comment - - edited

            Patrick Farrell (pfarrell@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/57357
            Subject: LU-18529 mdt: lazy as strict som
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 2
            Commit: dbd79127647cfa310312803f701d3eadb58f845b

            paf0186 Patrick Farrell added a comment - - edited Patrick Farrell (pfarrell@whamcloud.com) uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/57357 Subject: LU-18529 mdt: lazy as strict som Project: fs/lustre-release Branch: master Current Patch Set: 2 Commit: dbd79127647cfa310312803f701d3eadb58f845b

            People

              paf0186 Patrick Farrell
              paf0186 Patrick Farrell
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              Dates

                Created:
                Updated:
                Resolved: