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

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HDFS-17924?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated HDFS-17924:
----------------------------------
    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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