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Date: Sun, 8 Apr 2012 00:46:19 +0000 (UTC)
From: "stack (Commented) (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-5335) Dynamic Schema Configurations
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    [ https://issues.apache.org/jira/browse/HBASE-5335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13249438#comment-13249438 ] 

stack commented on HBASE-5335:
------------------------------

On shell unit tests, TestShell puts up a harness into which you can plug ruby tests
                
> Dynamic Schema Configurations
> -----------------------------
>
>                 Key: HBASE-5335
>                 URL: https://issues.apache.org/jira/browse/HBASE-5335
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Nicolas Spiegelberg
>            Assignee: Nicolas Spiegelberg
>              Labels: configuration, schema
>             Fix For: 0.96.0
>
>         Attachments: D2247.1.patch, D2247.2.patch, D2247.3.patch, D2247.4.patch, D2247.5.patch, D2247.6.patch, D2247.7.patch, D2247.8.patch, HBASE-5335-trunk-2.patch, HBASE-5335-trunk-3.patch, HBASE-5335-trunk-3.patch, HBASE-5335-trunk-4.patch, HBASE-5335-trunk.patch
>
>
> Currently, the ability for a core developer to add per-table & per-CF configuration settings is very heavyweight.  You need to add a reserved keyword all the way up the stack & you have to support this variable long-term if you're going to expose it explicitly to the user.  This has ended up with using Configuration.get() a lot because it is lightweight and you can tweak settings while you're trying to understand system behavior [since there are many config params that may never need to be tuned].  We need to add the ability to put & read arbitrary KV settings in the HBase schema.  Combined with online schema change, this will allow us to safely iterate on configuration settings.

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