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https://issues.apache.org/jira/browse/HDFS-13059?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16339580#comment-16339580
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Allen Wittenauer commented on HDFS-13059:
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bq. Our UI's are stateless and are not suitable for comparing any data point
over period of time.
I never said that the UI should show historical data[*]. I'm saying that
people will generate their own form of historical data via the UI. I've lost
track of how many conference presentations I've seen with screenshots of the NN
UI.
At this point, I'm bowing out of the topic. I've given my suggestion.
[*] - it could, however, given the metrics system does have a level of it
available. It again highlights why a bar chart or a stacked column chart would
be significantly better. But that's a different set of improvements altogether.
> Add pie chart in NN UI to show storage used
> -------------------------------------------
>
> Key: HDFS-13059
> URL: https://issues.apache.org/jira/browse/HDFS-13059
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Ajay Kumar
> Assignee: Ajay Kumar
> Priority: Major
> Attachments: HDFS-13059.001.patch, HDFS-13059.002.patch,
> HDFS-13059.003.patch, Screen Shot 2018-01-24 at 1.58.28 PM.png, Screen Shot
> 2018-01-24 at 1.58.33 PM.png, Screen Shot 2018-01-24 at 3.04.17 PM.png,
> fed-capacity.png
>
>
> This jira proposes to add a pie chart in NN UI to show storage used by:
> * DFS Used (Tooltip : "Storage currently used for DFS.")
> * DFS available (Tooltip : "Storage available for DFS use.")
> * Non DFS Used (Tooltip : "Storage allocated for DFS but currently" +
> " used by Non DFS storage.")
> Tooltip will help users better understand what these terms mean.
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