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https://issues.apache.org/jira/browse/HDFS-10534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15337348#comment-15337348
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Kai Sasaki commented on HDFS-10534:
-----------------------------------
[~zhz] Thanks for checking! It sounds reasonable. I think we can make
percentile configurable like
{code}
<property>
<name>dfs.namenode.metrics.node-usage.percentile</name>
<value>0.95</value>
<description>
This setting specifies the percentile value of disk usage of data nodes
which is sorted in ascending order. Default is 0.95.
</description>
</property>
{code}
> NameNode WebUI should display DataNode usage rate with a certain percentile
> ---------------------------------------------------------------------------
>
> Key: HDFS-10534
> URL: https://issues.apache.org/jira/browse/HDFS-10534
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: namenode, ui
> Reporter: Zhe Zhang
> Assignee: Kai Sasaki
> Attachments: HDFS-10534.01.patch, HDFS-10534.02.patch
>
>
> In addition of *Min/Median/Max*, another meaningful metric for cluster
> balance is DN usage rate at a certain percentile (e.g. 90 or 95). We should
> add a config option, and another filed on NN WebUI, to display this.
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