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https://issues.apache.org/jira/browse/HIVE-5091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14089861#comment-14089861
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Lefty Leverenz commented on HIVE-5091:
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Doc note: This changed the default value of configuration parameter
*hive.exec.orc.write.format* from 0.11 to null (before it was first released in
0.12).
*hive.exec.orc.write.format* was created in HIVE-4123, and it's 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]
> ORC files should have an option to pad stripes to the HDFS block boundaries
> ---------------------------------------------------------------------------
>
> Key: HIVE-5091
> URL: https://issues.apache.org/jira/browse/HIVE-5091
> Project: Hive
> Issue Type: Bug
> Components: File Formats
> Reporter: Owen O'Malley
> Assignee: Owen O'Malley
> Fix For: 0.12.0
>
> Attachments: HIVE-5091.D12249.1.patch, HIVE-5091.D12249.2.patch,
> HIVE-5091.D12249.3.patch
>
>
> With ORC stripes being large, if a stripe straddles an HDFS block, the
> locality of read is suboptimal. It would be good to add padding to ensure
> that stripes don't straddle HDFS blocks.
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