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From "Phabricator (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5335) Dynamic Schema Configurations
Date Mon, 19 Mar 2012 22:51:39 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5335?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13232980#comment-13232980
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Phabricator commented on HBASE-5335:
------------------------------------

nspiegelberg has commented on the revision "[jira] [HBASE-5335] Dynamic Schema Config".

INLINE COMMENTS
  src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java:4246 we need to chop
this file into multiple pieces for parallelization, separate from this JIRA, correct?  testFromClientSide
seems to be the correct spot since it's an HBase java client integration test.
  src/test/java/org/apache/hadoop/hbase/client/TestFromClientSide.java:4326 will make an HConstant

REVISION DETAIL
  https://reviews.facebook.net/D2247

                
> 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
>         Attachments: D2247.1.patch, D2247.2.patch, D2247.3.patch, D2247.4.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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