[hbck] Add region coverage visualization to hbck
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Key: HBASE-4375
URL: https://issues.apache.org/jira/browse/HBASE-4375
Project: HBase
Issue Type: New Feature
Affects Versions: 0.94.0, 0.90.5
Reporter: Jonathan Hsieh
After HBASE-4322 and HBASE-4321, we now have an accurate region splits /
coverage map for properly identifying holes, overlaps, backwards regions and
other kinds of problems in the .META. table. hbck should display this
information so that someone can fix this.
A simple version for a table with regions [,A], [A,B], [A,C], [C,] and would
dump out something like this (showing an overlap in [A,B])
: ['table,,..', 'table,A,..']
A: ['table,A,..', 'B'] ['table,A,..', 'C']
B: ['table,A,..', 'C']
C: ['table,C', '']
null:
My first thought is '-details' should this dump the full region map including
all good and bad regions. Without -details, any errors should dump info with
some context -- dump one region before problems, problem regions, and then one
post problem region.
Alternately we could add a new option or options to dump the region split map.
What is the preferred way to toggle display of this information in hbck?
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