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Posted to hdfs-issues@hadoop.apache.org by "Felix N (Jira)" <ji...@apache.org> on 2026/05/22 08:20:00 UTC

[jira] [Created] (HDFS-17924) Improve NameNode edit log rolling controls

Felix N created HDFS-17924:
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             Summary: Improve NameNode edit log rolling controls
                 Key: HDFS-17924
                 URL: https://issues.apache.org/jira/browse/HDFS-17924
             Project: Hadoop HDFS
          Issue Type: Improvement
          Components: hdfs
            Reporter: Felix N
            Assignee: Felix N


Currently, all 3 kinds of NNs trigger rollEditLog at some time interval and based on the number of edits using a threshold check.

If a subcluster has a lot of observers, active can roll very frequently, up to dozens of times per hour. This ticket aims improve that via 2 configurable features:
 * Only active should perform rollEditLog periodically, and it should guarantee a roll as long as there's something to roll, at a reasonable interval.
 * Standby and observer NNs can opt out of sending rollEditLog.



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