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https://issues.apache.org/jira/browse/HBASE-2165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12857041#action_12857041
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Lars George commented on HBASE-2165:
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Hmm, this was a full reversal, bummer I did not know you were that "desperate".
The changes also included values that were added to the RegionServerMetrics and
provided information about the compaction queues - which was fast and could
have stayed (also see HBASE-2143). In fact only the JSP's should have been
edited because they trigger the slow DFS scan synchronously.
I removed the whole target for 0.20 as no one is really interested in this by
the looks and leave the 0.21.0 target as I may fix this all up there once and
for all.
> 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: 0.20.5, 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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