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From "Ashutosh Chauhan (Commented) (JIRA)" <>
Subject [jira] [Commented] (HIVE-2600) Enable/Add type-specific compression for rcfile
Date Mon, 21 Nov 2011 17:02:51 GMT


Ashutosh Chauhan commented on HIVE-2600:

Do you envision it to be used only for intermediate data between map and reduce or is it for
end user data also?
> Enable/Add type-specific compression for rcfile
> -----------------------------------------------
>                 Key: HIVE-2600
>                 URL:
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor, Serializers/Deserializers
>            Reporter: Krishna Kumar
>            Assignee: Krishna Kumar
>            Priority: Minor
>         Attachments: HIVE-2600.v0.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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