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https://issues.apache.org/jira/browse/HDFS-10917?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15769000#comment-15769000
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Xiaobing Zhou commented on HDFS-10917:
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Posted v003 patch.
# fixed all check style issues.
# added some unit tests for peer metrics.
# did a bunch of refactoring.
> Collect peer performance statistics on DataNode.
> ------------------------------------------------
>
> Key: HDFS-10917
> URL: https://issues.apache.org/jira/browse/HDFS-10917
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: datanode
> Affects Versions: 2.8.0
> Reporter: Xiaobing Zhou
> Assignee: Xiaobing Zhou
> Attachments: HDFS-10917.000.patch, HDFS-10917.001.patch,
> HDFS-10917.002.patch, HDFS-10917.003.patch
>
>
> DataNodes already detect if replication pipeline operations are slow and log
> warnings. For the purpose of analysis, performance metrics are desirable.
> This proposes adding them on DataNodes.
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