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From "Jonathan Hsieh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4375) [hbck] Add region coverage visualization to hbck
Date Mon, 12 Sep 2011 21:17:09 GMT
[hbck] Add region coverage visualization to hbck

                 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', '']

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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