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https://issues.apache.org/jira/browse/AMBARI-10732?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hari Sekhon updated AMBARI-10732:
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Attachment: Ambari recommending massive NameNode Heap.png
> Ambari recommending huge NameNode heap size increase after HDFS storage
> tiering
> -------------------------------------------------------------------------------
>
> Key: AMBARI-10732
> URL: https://issues.apache.org/jira/browse/AMBARI-10732
> Project: Ambari
> Issue Type: Bug
> Components: ambari-server
> Affects Versions: 2.0.0
> Environment: HDP 2.2
> Reporter: Hari Sekhon
> Priority: Minor
> Attachments: Ambari recommending massive NameNode Heap.png
>
>
> After adding an HDFS storage tiering configuration, on saving it Ambari
> suddenly recommends the configuration of the NameNode heap be drastically
> increased from around 3GB to 51GB, even though the archive tier only adds 1/5
> of the capacity compared to the already configured local disk and the
> NameNode heap is only 65% used right now.
> This seems like a calculation bug, so I've ignored that recommendation and
> may increase the NameNode heap to a more sensible 4-5GB if needed.
> I'm attaching a screenshot.
> Hari Sekhon
> http://www.linkedin.com/in/harisekhon
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