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https://issues.apache.org/jira/browse/HDFS-853?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12794473#action_12794473
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dhruba borthakur commented on HDFS-853:
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We can calculate the variance of space-usage by parsing "dfsadmin -report"
but it will be good to have it in the webUI. It will also be good to expose it
via a Hadoop Metric.
> The HDFS webUI should show a metric that summarizes whether the cluster is
> balanced regarding disk space usage
> --------------------------------------------------------------------------------------------------------------
>
> Key: HDFS-853
> URL: https://issues.apache.org/jira/browse/HDFS-853
> Project: Hadoop HDFS
> Issue Type: Improvement
> Components: name-node
> Reporter: dhruba borthakur
>
> It is desirable to know how much the datanodes vary form one another in terms
> of space utilization to get a sense of how well a HDFS cluster is balanced.
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