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From "Andrew Purtell (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1108) Redundant meta tables
Date Thu, 30 Apr 2009 22:41:30 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1108?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Andrew Purtell updated HBASE-1108:

    Fix Version/s:     (was: 0.20.0)

> Redundant meta tables
> ---------------------
>                 Key: HBASE-1108
>                 URL: https://issues.apache.org/jira/browse/HBASE-1108
>             Project: Hadoop HBase
>          Issue Type: Sub-task
>            Reporter: Andrew Purtell
> If the data file for -ROOT- or .META. is damaged, a HBase installation is rendered inoperative.
Manual recovery through writing a new -ROOT- by hand is relatively simple (I think) but it's
not simple and maybe not even possible to recreate a .META. containing thousands of regions.
During one experiment I lost the entire .META. data file due to DFS errors during compaction.
This can be avoided by utilizing multiple backing data files for -ROOT- and .META. synchronized
in a manner that avoids total data loss should the filesystem become degraded. 

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