[jira] [Commented] (HBASE-4375) [hbck] Add region coverage visualization to hbck

["Jonathan Hsieh (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-4375?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13103701#comment-13103701 ] 

Jonathan Hsieh commented on HBASE-4375:
---------------------------------------

Patch applies on 0.90 and trunk after HBASE-4322.

> [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
>            Assignee: Jonathan Hsieh
>         Attachments: 0001-HBASE-4375-Add-region-coverage-visualization-to-hbck.patch
>
>
> 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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