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From "Kai Sasaki (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10534) NameNode WebUI should display DataNode usage histogram
Date Sat, 21 Jan 2017 02:40:26 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15832753#comment-15832753

Kai Sasaki commented on HDFS-10534:

[~zhz] Thanks! [3rd JavaScript libraries used in HDFS|https://github.com/apache/hadoop/tree/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/webapps/static]
are not modified about license header. So we can add d3.js file as it is with its header because
it is released under [modified BSD license|https://github.com/d3/d3/blob/master/LICENSE].

> NameNode WebUI should display DataNode usage histogram
> ------------------------------------------------------
>                 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, HDFS-10534.06.patch, HDFS-10534.07.patch, HDFS-10534.08.patch, HDFS-10534.09.patch,
HDFS-10534.10.patch, Screen Shot 2016-06-23 at 6.25.50 AM.png, Screen Shot 2016-07-07 at 23.29.14.png,
Screen Shot 2016-11-14 at 4.27.15 PM.png, Screen Shot 2016-11-17 at 0.14.06.png, table_histogram.html
> In addition of *Min/Median/Max*, another meaningful metric for cluster balance is DN
usage in histogram style.
> Since NN already has provided necessary information to calculate histogram of DN usage,
it can be done in JS side.

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