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https://issues.apache.org/jira/browse/HIVE-14270?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15389817#comment-15389817
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Thomas Poepping commented on HIVE-14270:
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The unit tests you want would verify that the scheme of the temporary
directories is hdfs if the scheme of the original directory "isS3".
I suggest you write a kind of helper method (getTempDir, maybe) that returns a
proper temporary directory based on the scheme we have. That will be more
easily unit testable, and will prevent future developers adding new features
that need temp directories to remember to check "isS3" before they do so.
> Write temporary data to HDFS when doing inserts on tables located on S3
> -----------------------------------------------------------------------
>
> Key: HIVE-14270
> URL: https://issues.apache.org/jira/browse/HIVE-14270
> Project: Hive
> Issue Type: Sub-task
> Reporter: Sergio Peña
> Assignee: Sergio Peña
> Attachments: HIVE-14270.1.patch
>
>
> Currently, when doing INSERT statements on tables located at S3, Hive writes
> and reads temporary (or intermediate) files to S3 as well.
> If HDFS is still the default filesystem on Hive, then we can keep such
> temporary files on HDFS to keep things run faster.
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