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https://issues.apache.org/jira/browse/HDFS-5320?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13819168#comment-13819168
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Colin Patrick McCabe commented on HDFS-5320:
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Looks good to me. +1.
> Add datanode caching metrics
> ----------------------------
>
> Key: HDFS-5320
> URL: https://issues.apache.org/jira/browse/HDFS-5320
> Project: Hadoop HDFS
> Issue Type: Sub-task
> Components: datanode
> Affects Versions: 3.0.0
> Reporter: Andrew Wang
> Assignee: Andrew Wang
> Priority: Minor
> Attachments: hdfs-5320-1.patch, hdfs-5320-2.patch, hdfs-5320-3.patch
>
>
> It'd be good to hook up datanode metrics for # (blocks/bytes)
> (cached/uncached/failed to cache) over different time windows
> (eternity/1hr/10min/1min).
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