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https://issues.apache.org/jira/browse/HDFS-11545?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15933606#comment-15933606
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Arpit Agarwal commented on HDFS-11545:
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+1 for the v2 patch pending Jenkins.
> Propagate DataNode's slow disks info to the NameNode via Heartbeat
> ------------------------------------------------------------------
>
> Key: HDFS-11545
> URL: https://issues.apache.org/jira/browse/HDFS-11545
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Hanisha Koneru
> Assignee: Hanisha Koneru
> Attachments: HDFS-11545.001.patch, HDFS-11545.002.patch
>
>
> DataNode detects the outliers (slow disks) among all its disk. This
> information can be propagated to the NameNode so that the NameNode gets disk
> information from all Datanodes.
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