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https://issues.apache.org/jira/browse/HIVE-4123?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089866#comment-14089866
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Lefty Leverenz commented on HIVE-4123:
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Doc note: This added configuration parameter *hive.exec.orc.write.format* with
a default value of 0.11, which was changed to null by HIVE-5091 before the
release.
*hive.exec.orc.write.format* is documented in the wiki here:
* [Configuration Properties -- hive.exec.orc.write.format |
https://cwiki.apache.org/confluence/display/Hive/Configuration+Properties#ConfigurationProperties-hive.exec.orc.write.format]
> The RLE encoding for ORC can be improved
> ----------------------------------------
>
> Key: HIVE-4123
> URL: https://issues.apache.org/jira/browse/HIVE-4123
> Project: Hive
> Issue Type: New Feature
> Components: File Formats
> Affects Versions: 0.12.0
> Reporter: Owen O'Malley
> Assignee: Prasanth J
> Labels: orcfile
> Fix For: 0.12.0
>
> Attachments: HIVE-4123-8.patch, HIVE-4123.1.git.patch.txt,
> HIVE-4123.2.git.patch.txt, HIVE-4123.3.patch.txt, HIVE-4123.4.patch.txt,
> HIVE-4123.5.txt, HIVE-4123.6.txt, HIVE-4123.7.txt, HIVE-4123.8.txt,
> HIVE-4123.8.txt, HIVE-4123.patch.txt, ORC-Compression-Ratio-Comparison.xlsx
>
>
> The run length encoding of integers can be improved:
> * tighter bit packing
> * allow delta encoding
> * allow longer runs
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