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https://issues.apache.org/jira/browse/HDFS-11194?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16322782#comment-16322782
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Hanisha Koneru commented on HDFS-11194:
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[~Leo Chen], in the Namenode JMX, the metric is {{SlowPeersReport}}.
> Maintain aggregated peer performance metrics on NameNode
> --------------------------------------------------------
>
> Key: HDFS-11194
> URL: https://issues.apache.org/jira/browse/HDFS-11194
> Project: Hadoop HDFS
> Issue Type: New Feature
> Components: namenode
> Reporter: Xiaobing Zhou
> Assignee: Arpit Agarwal
> Fix For: 2.9.0, 3.0.0-alpha4
>
> Attachments: HDFS-11194-03-04.delta, HDFS-11194.01.patch,
> HDFS-11194.02.patch, HDFS-11194.03.patch, HDFS-11194.04.patch,
> HDFS-11194.05.patch, HDFS-11194.06.patch
>
>
> The metrics collected in HDFS-10917 should be reported to and aggregated on
> NameNode as part of heart beat messages. This will make is easy to expose it
> through JMX to users who are interested in them.
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