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Date: Sat, 29 Oct 2011 22:47:33 +0000 (UTC)
From: "Ted Yu (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-4377) [hbck] Offline rebuild .META. from
 fs data only.
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    [ https://issues.apache.org/jira/browse/HBASE-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13139482#comment-13139482 ] 

Ted Yu commented on HBASE-4377:
-------------------------------

The patch for 0.90 doesn't cleanly compile yet.
We need to produce a clean patch for 0.90 and run test suite for it so that 0.90 can have this feature.
                
> [hbck] Offline rebuild .META. from fs data only.
> ------------------------------------------------
>
>                 Key: HBASE-4377
>                 URL: https://issues.apache.org/jira/browse/HBASE-4377
>             Project: HBase
>          Issue Type: New Feature
>    Affects Versions: 0.92.0
>            Reporter: Jonathan Hsieh
>            Assignee: Jonathan Hsieh
>         Attachments: 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.0.90-v4.patch, 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.0.90.v3.patch, 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.patch, 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.trunk.v3.patch, 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data.0.92.v1.patch, 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data.0.92.v2.patch, EXT_AC.regioninfo, EXT_ATU_05f84d32cbc0bdabf00e00bc2f3570f0.regioninfo, hbase-4377-trunk.v2.patch, hbase-4377.trunk.v3.txt, hbase-4377.trunk.v4.txt, hbase-4377.trunk.v5.txt
>
>
> In a worst case situation, it may be helpful to have an offline .META. rebuilder that just looks at the file system's .regioninfos and rebuilds meta from scratch.  Users could move bad regions out until there is a clean rebuild.  
> It would likely fill in region split holes.  Follow on work could given options to merge or select regions that overlap, or do online rebuilds.

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