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https://issues.apache.org/jira/browse/HDFS-6763?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Kihwal Lee updated HDFS-6763:
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Attachment: HDFS-6763.v2.patch
Revised the patch after HDFS-8865. The quota initialization code is moved from
{{FSImage}} to {{FSDirectory}}. This is an operation against a directory tree
after all.
It was wired to {{FSImage#loadImage()}}, so {{EditLogTailer}} was causing quota
initialization every time it checks (default 1 min interval), regardless of
whether it replayed any edits or not. This really only needs to be done when
the NN becomes active.
> Initialize file system-wide quota once on transitioning to active
> -----------------------------------------------------------------
>
> Key: HDFS-6763
> URL: https://issues.apache.org/jira/browse/HDFS-6763
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: ha, namenode
> Reporter: Daryn Sharp
> Assignee: Kihwal Lee
> Labels: BB2015-05-TBR
> Attachments: HDFS-6763.patch, HDFS-6763.v2.patch
>
>
> {{FSImage#loadEdits}} calls {{updateCountForQuota}} to recalculate & verify
> quotas for the entire namespace. A standby NN using shared edits calls this
> method every minute. The standby may appear to "hang" for many seconds.
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