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https://issues.apache.org/jira/browse/HIVE-8720?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14196510#comment-14196510
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Sergey Shelukhin commented on HIVE-8720:
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+1
> Update orc_merge tests to make it consistent across OS'es
> ---------------------------------------------------------
>
> Key: HIVE-8720
> URL: https://issues.apache.org/jira/browse/HIVE-8720
> Project: Hive
> Issue Type: Bug
> Affects Versions: 0.14.0
> Reporter: Prasanth J
> Assignee: Prasanth J
> Attachments: HIVE-8720.1.patch, orc_merge5_filedump_macosx.txt,
> orc_merge5_filedump_opensuse.txt
>
>
> orc_merge*.q test cases fails with qfile diffs related to file size on
> different OSes. I have seen failures with Open SUSE and CentOS. The order of
> insertion of rows into ORC table impacts the file size because of run length
> encoding. Since the order of rows is not guaranteed during insertion into
> table we may get different file sizes. We cannot add ORDER BY to insert
> queries as it will force insertion through single reducer which will disable
> orc merge file optimization. Since these test cases test if the files are
> merged or not it is sufficient to know the number of files after merging.
> Instead of DESCRIBE FORMATTED (which shows the numFiles and fileSize) we can
> use "dfs -ls" to know the number of files.
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