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  1. Lustre
  2. LU-16797

improve numeric NID to CPT hashing

Details

    • Improvement
    • Resolution: Fixed
    • Minor
    • Lustre 2.16.0
    • None
    • None
    • 3
    • 9223372036854775807

    Description

      Testing shows that the sum-by-multiplication of nid bytes method for hashing a NID to a CPT does not have good distribution for gnilnd and kfilnd NIDs. For these LNDs, use the old hash_long() method.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-17752 Advanced hash function for better CPT allocation

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

          Technical task - A technical task. LU-14676 Better hash distribution to different CPTs when LNET router is exist

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

          Activity

            [LU-16797] improve numeric NID to CPT hashing
            pjones Peter Jones added a comment -

            Landed for 2.16

            pjones Peter Jones added a comment - Landed for 2.16
            gerrit Gerrit Updater added a comment -

            "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/50862/
            Subject: LU-16797 lnet: improve numeric NID to CPT hashing
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: bd12731f2f15b390345a3b58947325885346b072

            gerrit Gerrit Updater added a comment - "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/50862/ Subject: LU-16797 lnet: improve numeric NID to CPT hashing Project: fs/lustre-release Branch: master Current Patch Set: Commit: bd12731f2f15b390345a3b58947325885346b072
            gerrit Gerrit Updater added a comment -

            "Chris Horn <chris.horn@hpe.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50862
            Subject: LU-16797 lnet: improve numeric NID to CPT hashing
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 71d34fd57616d41081cfd21df1c4b2a7024a7f6b

            gerrit Gerrit Updater added a comment - "Chris Horn <chris.horn@hpe.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/50862 Subject: LU-16797 lnet: improve numeric NID to CPT hashing Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 71d34fd57616d41081cfd21df1c4b2a7024a7f6b

            People

              hornc Chris Horn
              hornc Chris Horn
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              Dates

                Created:
                Updated:
                Resolved: