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  1. Lustre
  2. LU-17030

allow setting max_cached_mb with %

Details

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

    Description

      Lustre's max_cached_mb parameter is challenging because it must be set to a specific numeric value, so in effect it cannot be set on the server side unless all clients are guaranteed identical.

      Let's add the ability to set that to a % of memory to make it more useful.

      Attachments

        Issue Links

          is duplicated by

          Improvement - An improvement or enhancement to an existing feature or task. LU-16757 Allow max_cached_mb to be set as a percentage of system ram

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

          Bug - A problem which impairs or prevents the functions of the product. LU-16749 apply a filter to the configuration log.

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

          Improvement - An improvement or enhancement to an existing feature or task. LU-18939 readahead parameters should allow percentage with sysfs_memparse_total()

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

          Activity

            [LU-17030] allow setting max_cached_mb with %
            paf0186 Patrick Farrell added a comment -

            Merged

            paf0186 Patrick Farrell added a comment - Merged
            gerrit Gerrit Updater added a comment -

            "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/51952/
            Subject: LU-17030 llite: allow setting max_cached_mb to a %
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: e40be984009b2ae4efe13a19e3acf3cd9e183124

            gerrit Gerrit Updater added a comment - "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/51952/ Subject: LU-17030 llite: allow setting max_cached_mb to a % Project: fs/lustre-release Branch: master Current Patch Set: Commit: e40be984009b2ae4efe13a19e3acf3cd9e183124
            gerrit Gerrit Updater added a comment -

            "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/51952
            Subject: LU-17030 llite: allow setting max_cached_mb to a %
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: 928753ecbc8ac656dd98bfa56483c02c9f2c2aa5

            gerrit Gerrit Updater added a comment - "Patrick Farrell <pfarrell@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/51952 Subject: LU-17030 llite: allow setting max_cached_mb to a % Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: 928753ecbc8ac656dd98bfa56483c02c9f2c2aa5

            People

              paf0186 Patrick Farrell
              paf0186 Patrick Farrell
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              Dates

                Created:
                Updated:
                Resolved: