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https://issues.apache.org/jira/browse/HDFS-16617?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yongpan Liu updated HDFS-16617:
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Attachment: HDFS-16617.001.patch
Status: Patch Available (was: Open)
> [SBN read] add txid lag metric for Observer NameNode
> ----------------------------------------------------
>
> Key: HDFS-16617
> URL: https://issues.apache.org/jira/browse/HDFS-16617
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode
> Reporter: Yongpan Liu
> Priority: Minor
> Attachments: HDFS-16617.001.patch
>
>
> Observer NN may have poor read performance due to various reasons (serious
> GC, code problems, or txid lags behind, etc.).
> Added latency monitoring with Active NN's txid to Observer NN to help us
> troubleshoot some of the issues.
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