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https://issues.apache.org/jira/browse/HIVE-7509?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14078876#comment-14078876
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Lefty Leverenz commented on HIVE-7509:
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This adds two configuration parameters: *hive.merge.orcfile.stripe.level* and
*hive.merge.input.format.stripe.level*.
I put some comments on the review board.
> Fast stripe level merging for ORC
> ---------------------------------
>
> Key: HIVE-7509
> URL: https://issues.apache.org/jira/browse/HIVE-7509
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Labels: orcfile
> Attachments: HIVE-7509.1.patch, HIVE-7509.2.patch, HIVE-7509.3.patch,
> HIVE-7509.4.patch
>
>
> Similar to HIVE-1950, add support for fast stripe level merging of ORC files
> through CONCATENATE command and conditional merge task. This fast merging is
> ideal for merging many small ORC files to a larger file without decompressing
> and decoding the data of small orc files.
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