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From "Sebastian Bauer (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-4377) [hbck] Offline rebuild .META. from fs data only.
Date Tue, 25 Oct 2011 09:06:32 GMT

     [ https://issues.apache.org/jira/browse/HBASE-4377?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sebastian Bauer updated HBASE-4377:
-----------------------------------

    Attachment: 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data.0.92.v1.patch

It base from 0001-HBASE-4377-hbck-Offline-rebuild-.META.-from-fs-data-.trunk.v3.patch

It have small enhancement in MetaEntry constructor, because i had realy broken testing env
after recreating META i had empty TableName values, so this enhancement fill TableName from
regionName, this need setTableName method in HRegionInfo class(now ith public, but its can
be protect). After recreating META lastly i have testing env working again :)
                
> [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
>            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,
hbase-4377-trunk.v2.patch
>
>
> 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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