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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1066) Master should support close/open/reassignment/enable/disable operations on individual regions
Date Tue, 23 Dec 2008 21:58:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1066?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-1066:
-------------------------

    Attachment: 1066-v3.patch

Adds enable/disable and close region with optional removal of STARTCODE and SERVER (so gets
reassigned).  Also added being able to specify servername you want to send the close to in
case META is not in agreement with whats out on regionservers.  Done as new commands in the
shell: enable_region, disable_region, and close_region.  Need to add in help and figure why
removal of STARTCODE and SERVER does not always get a region reassigned.  

> Master should support close/open/reassignment/enable/disable operations on individual
regions
> ---------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1066
>                 URL: https://issues.apache.org/jira/browse/HBASE-1066
>             Project: Hadoop HBase
>          Issue Type: Improvement
>            Reporter: Andrew Purtell
>             Fix For: 0.19.0
>
>         Attachments: 1066-v3.patch, 1066.patch
>
>
> The master should support close/open/reassignment/enable/disable operations on individual
regions by way of a client API and corresponding shell command(s), and maybe also controls
on the master UI.
>  
> If one region out of 1000s is closed or offline, for example due to transient DFS problems,
currently the whole table must be disabled, then reenabled to trigger reassignment and, hopefully,
successful (re)open of the offline regions. The flurry of compactions this causes can exacerbate
the underlying problem and actually make cluster state worse, as more DFS errors accumulate.


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