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From "Zhe Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10534) NameNode WebUI should display DataNode usage rate with a certain percentile
Date Fri, 24 Jun 2016 16:18:16 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10534?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348500#comment-15348500
] 

Zhe Zhang commented on HDFS-10534:
----------------------------------

Should this (adding a metric and adding it to web UI) be considered an incompatible change?
If not I'd like to backport to 2.6.

[~andrew.wang] [~vinodkv] Any advice? Thanks.

> 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
>             Fix For: 3.0.0-alpha1
>
>         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.



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