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From "Vinayakumar B (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-10440) Improve DataNode web UI
Date Fri, 17 Jun 2016 05:47:05 GMT

    [ https://issues.apache.org/jira/browse/HDFS-10440?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335466#comment-15335466
] 

Vinayakumar B commented on HDFS-10440:
--------------------------------------

I was thinking about incompatible change done in {{DataNodeMXBean#getNamenodeAddresses()}}.
Patch returns more information than just addresses.
Instead of breaking compatibility, how about adding one more metric entry, ex: {{getNameNodesInfo()}},
this way we would keep the compatibility also, i.e. Adding a new JMX entry is compatible mentioned
[here|http://hadoop.apache.org/docs/stable/hadoop-project-dist/hadoop-common/Compatibility.html#MetricsJMX].
Address information is redundant, but better than breaking compatibility.
[~kihwal], what you think?

> Improve DataNode web UI
> -----------------------
>
>                 Key: HDFS-10440
>                 URL: https://issues.apache.org/jira/browse/HDFS-10440
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>          Components: datanode, ui
>    Affects Versions: 2.7.0
>            Reporter: Weiwei Yang
>            Assignee: Weiwei Yang
>         Attachments: HDFS-10440.001.patch, HDFS-10440.002.patch, HDFS-10440.003.patch,
datanode_2nns.html.002.jpg, datanode_html.001.jpg, datanode_loading_err.002.jpg, datanode_utilities.001.jpg,
datanode_utilities.002.jpg, dn_web_ui.003.jpg, dn_web_ui_mockup.jpg, nn_dfs_storage_types.jpg
>
>
> At present, datanode web UI doesn't have much information except for node name and port.
Propose to add more information similar to namenode UI, including, 
> * Static info (version, block pool  and cluster ID)
> * Block pools info (BP IDs, namenode address, actor states)
> * Storage info (Volumes, capacity used, reserved, left)
> * Utilities (logs)



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