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Kai Sasaki commented on HDFS-10534: ----------------------------------- [~andrew.wang] Thanks for comment. I think it is possible to calculate the histogram because NN provides UI which shows the usage of each DN. So I'll try to update a patch to build histogram on JS side. And also I'll update the title of this JIRA to fit current motivation. > 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, > HDFS-10534.03.patch, HDFS-10534.04.patch, HDFS-10534.05.patch, Screen Shot > 2016-06-23 at 6.25.50 AM.png > > > 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. -- This message was sent by Atlassian JIRA (v6.3.4#6332) --------------------------------------------------------------------- To unsubscribe, e-mail: hdfs-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: hdfs-issues-h...@hadoop.apache.org