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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4119) Ability to add column families without disabling the table
Date Thu, 21 Jul 2011 06:29:57 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4119?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13068826#comment-13068826
] 

stack commented on HBASE-4119:
------------------------------

@Dhruba For 'locality groups', see the big table paper.  Locality groups are made of one or
more column families.  In the schema you designated what cfs were in what locality groups.
 Then, apparently, all cf members of a locality group were colocated on disk.  Also, you could
change what cfs belonged to what locality groups.

HBase doesn't have notion of locality groups. It just has cfs (We 'conflate' locality groups
and column families -- or we just don't do locality groups).

@Todd I think it likely too much work.  Should we support locality groups?   On the fly we'd
support moving cfs between locality groups?



> Ability to add column families without disabling the table
> ----------------------------------------------------------
>
>                 Key: HBASE-4119
>                 URL: https://issues.apache.org/jira/browse/HBASE-4119
>             Project: HBase
>          Issue Type: Improvement
>          Components: master, regionserver
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>
> Support adding a new column family for a table without disabling the table.

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