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https://issues.apache.org/jira/browse/HDFS-7836?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14349599#comment-14349599
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Chris Nauroth commented on HDFS-7836:
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The thing we're losing is the ability to measure memory consumption by the
block map specifically. The OS and standard JMX metrics are great for
measuring the whole process in aggregate, but it would be nice to add another
counter to compensate for the measurement we'd be losing.
> BlockManager Scalability Improvements
> -------------------------------------
>
> Key: HDFS-7836
> URL: https://issues.apache.org/jira/browse/HDFS-7836
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Charles Lamb
> Assignee: Charles Lamb
> Attachments: BlockManagerScalabilityImprovementsDesign.pdf
>
>
> Improvements to BlockManager scalability.
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