[jira] Commented: (HBASE-2165) Improve fragmentation display and implementation

["Jean-Daniel Cryans (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-2165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12805250#action_12805250 ] 

Jean-Daniel Cryans commented on HBASE-2165:
-------------------------------------------

I love these ideas.

> Improve fragmentation display and implementation
> ------------------------------------------------
>
>                 Key: HBASE-2165
>                 URL: https://issues.apache.org/jira/browse/HBASE-2165
>             Project: Hadoop HBase
>          Issue Type: Improvement
>    Affects Versions: 0.20.4, 0.21.0
>            Reporter: Lars George
>            Priority: Minor
>             Fix For: 0.20.4, 0.21.0
>
>
> Improve by 
> - moving the "blocking" FS scan into a thread so that the UI loads fast and initially displays "n/a" but once it has completed the scan it displays the proper numbers
> - explaining what fragmentation means to the user (better hints or help text in UI)
> - Switch -ROOT- (and maybe even .META.?) to simply say "Yes" or a tick that it is fragmented as it only has 0% or 100% available (since it has only a single region)
> - also computing the space occupied by each table and the total and - if easily done - add a graph to display it (Google Pie Chart would be nice but is an external link)

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