Improve fragmentation display and implementation
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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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