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  1. Lustre
  2. LU-17428

reduce default value for lru_max_age to 300s

Details

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

    Description

      The default value for lru_max_age is currently 3900s (3900000 msec), or 1h5m.

      For most systems and use cases, this is far too long and can lead to clients holding on to locks that they don't need and may cause issues for other clients if those clients holding the LDLM locks have any network issues and the server lock callback RPCs are slow. It may also cause issues with the LRU, if clients hold on to locks only used once for a long time and potentially evict more important locks sooner, though more work is still needed to the DLM LRU algorithm in LU-11509.

      We regularly tune ldlm.namespaces.*.lru_max_age=300s on large clusters, and it makes sense to change this to be the default.

      Attachments

        Issue Links

          duplicates

          Improvement - An improvement or enhancement to an existing feature or task. LU-14517 Decrease default lru_max_age value

          • 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-7266 Fix LDLM pool to make LRUR working properly

          • Critical - Crashes, loss of data, severe memory leak.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. LU-6402 reduce the value of LDLM_POOL_MAX_AGE

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

          Bug - A problem which impairs or prevents the functions of the product. LU-15630 recovery-small test_10a: no eviction: before:1646723217

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

          Bug - A problem which impairs or prevents the functions of the product. LU-18288 sanity test_120e: FAIL: 2 cancel RPC occured

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

          Bug - A problem which impairs or prevents the functions of the product. LU-6529 Server side lock limits to avoid unnecessary memory exhaustion

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. LU-11509 LDLM: replace client lock LRU with improved cache algorithm

          • Major - Major loss of function.
          • Open
          is related to

          Bug - A problem which impairs or prevents the functions of the product. LU-11092 NMI watchdog: BUG: soft lockup - CPU#12 stuck for 23s! [ptlrpcd_00_18:4222]

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

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          Activity

            [LU-17428] reduce default value for lru_max_age to 300s
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-18288 [ LU-18288 ]
            gerrit Gerrit Updater added a comment -

            "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/56377/
            Subject: LU-17428 tests: restore recovery-small/10a lru_max_age
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: c73f731f252b2628dc17de315f79bbf5d86965e0

            gerrit Gerrit Updater added a comment - "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/56377/ Subject: LU-17428 tests: restore recovery-small/10a lru_max_age Project: fs/lustre-release Branch: master Current Patch Set: Commit: c73f731f252b2628dc17de315f79bbf5d86965e0
            gerrit Gerrit Updater added a comment -

            "Andreas Dilger <adilger@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/56377
            Subject: LU-17428 tests: restore recovery-small/10a lru_max_age
            Project: fs/lustre-release
            Branch: master
            Current Patch Set: 1
            Commit: e7749b1808864efe7e60c6491a9f58f69fa85c7b

            gerrit Gerrit Updater added a comment - "Andreas Dilger <adilger@whamcloud.com>" uploaded a new patch: https://review.whamcloud.com/c/fs/lustre-release/+/56377 Subject: LU-17428 tests: restore recovery-small/10a lru_max_age Project: fs/lustre-release Branch: master Current Patch Set: 1 Commit: e7749b1808864efe7e60c6491a9f58f69fa85c7b
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-15630 [ LU-15630 ]
            pjones Peter Jones made changes -
            Fix Version/s New: Lustre 2.16.0 [ 15190 ]
            Resolution New: Fixed [ 1 ]
            Status Original: Open [ 1 ] New: Resolved [ 5 ]
            pjones Peter Jones added a comment -

            Merged for 2.16

            pjones Peter Jones added a comment - Merged 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/+/53682/
            Subject: LU-17428 ldlm: reduce default lru_max_age
            Project: fs/lustre-release
            Branch: master
            Current Patch Set:
            Commit: 357cae970c5c45e8d58574db3c38b60e22565b6d

            gerrit Gerrit Updater added a comment - "Oleg Drokin <green@whamcloud.com>" merged in patch https://review.whamcloud.com/c/fs/lustre-release/+/53682/ Subject: LU-17428 ldlm: reduce default lru_max_age Project: fs/lustre-release Branch: master Current Patch Set: Commit: 357cae970c5c45e8d58574db3c38b60e22565b6d
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-11509 [ LU-11509 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-6529 [ LU-6529 ]
            adilger Andreas Dilger made changes -
            Link New: This issue is related to LU-6402 [ LU-6402 ]

            People

              adilger Andreas Dilger
              adilger Andreas Dilger
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              Dates

                Created:
                Updated:
                Resolved: