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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-4815) Disable online altering by default, create a config for it
Date Sat, 19 Nov 2011 17:58:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-4815?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13153535#comment-13153535
] 

Hudson commented on HBASE-4815:
-------------------------------

Integrated in HBase-0.92 #147 (See [https://builds.apache.org/job/HBase-0.92/147/])
    HBASE-4815 Addendum sets hbase.online.schema.update.enable to true for TestAdmin

tedyu : 
Files : 
* /hbase/branches/0.92/src/test/java/org/apache/hadoop/hbase/client/TestAdmin.java

                
> Disable online altering by default, create a config for it
> ----------------------------------------------------------
>
>                 Key: HBASE-4815
>                 URL: https://issues.apache.org/jira/browse/HBASE-4815
>             Project: HBase
>          Issue Type: Task
>    Affects Versions: 0.92.0
>            Reporter: Jean-Daniel Cryans
>            Assignee: ramkrishna.s.vasudevan
>            Priority: Blocker
>             Fix For: 0.92.0
>
>         Attachments: 4815-v2.txt, 4815.addendum, 4815.patch
>
>
> There's a whole class of bugs that we've been revealing from trying out online altering
in conjunction with other operations like splitting. HBASE-4729, HBASE-4794, and HBASE-4814
are examples.
> It's not so much that the online altering code is buggy, but that it wasn't tested in
an environment that permits splitting.
> I think we should mark online altering as experimental in 0.92 and add a config to enable
it (so it would be disabled by default, requiring people to enable for altering table schema).

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