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https://issues.apache.org/jira/browse/HIVE-10114?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14483883#comment-14483883
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Gopal V commented on HIVE-10114:
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[~leftylev]: the hybrid mode needs explanation (the the others have been left
in as a "we want the old mode back" safety).
I am still tuning Hybrid to existing workloads - so the exact way it works will
change before we ship 1.2, I can document this once we branch.
> Split strategies for ORC
> ------------------------
>
> Key: HIVE-10114
> URL: https://issues.apache.org/jira/browse/HIVE-10114
> Project: Hive
> Issue Type: Improvement
> Affects Versions: 1.2.0
> Reporter: Prasanth Jayachandran
> Assignee: Prasanth Jayachandran
> Fix For: 1.2.0
>
> Attachments: HIVE-10114.1.patch, HIVE-10114.2.patch,
> HIVE-10114.3.patch, HIVE-10114.4.patch, HIVE-10114.5.patch
>
>
> ORC split generation does not have clearly defined strategies for different
> scenarios (many small orc files, few small orc files, many large files etc.).
> Few strategies like storing the file footer in orc split, making entire file
> as a orc split already exists. This JIRA to make the split generation
> simpler, support different strategies for various use cases (BI, ETL, ACID
> etc.) and to lay the foundation for HIVE-7428.
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