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From "Hudson (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-2600) Enable/Add type-specific compression for rcfile
Date Sun, 25 Dec 2011 02:21:30 GMT

    [ https://issues.apache.org/jira/browse/HIVE-2600?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13175790#comment-13175790
] 

Hudson commented on HIVE-2600:
------------------------------

Integrated in Hive-trunk-h0.21 #1168 (See [https://builds.apache.org/job/Hive-trunk-h0.21/1168/])
    HIVE-2600: Enable/Add type-specific compression for rcfile (Krishna Kumar via He Yongqiang)

heyongqiang : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1223025
Files : 
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/RCFile.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/SchemaAwareCompressionInputStream.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/SchemaAwareCompressionOutputStream.java

                
> Enable/Add type-specific compression for rcfile
> -----------------------------------------------
>
>                 Key: HIVE-2600
>                 URL: https://issues.apache.org/jira/browse/HIVE-2600
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor, Serializers/Deserializers
>            Reporter: Krishna Kumar
>            Assignee: Krishna Kumar
>            Priority: Minor
>         Attachments: HIVE-2600.D1005.1.patch, HIVE-2600.D1005.2.patch, HIVE-2600.D1005.3.patch,
HIVE-2600.v0.patch, HIVE-2600.v1.patch
>
>
> Enable schema-aware compression codecs which can perform type-specific compression on
a per-column basis. I see this as in three-parts
> 1. Add interfaces for the rcfile to communicate column information to the codec
> 2. Add an "uber compressor" which can perform column-specific compression on a per-block
basis. Initially, this can be config driven, but we can go for a dynamic implementation later.
> 3. A bunch of type-specific compressors
> This jira is for the first part of the effort.

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