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https://issues.apache.org/jira/browse/HDFS-17924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated HDFS-17924:
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Labels: pull-request-available (was: )
> 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
> Priority: Minor
> Labels: pull-request-available
>
> 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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