Prasanth Jayachandran commented on HIVE-18659:

[~ekoifman] Looks like there are 2 versioning methods now. I am seeing another 
side file (_orc_acid_version) with version info. Why not use that? Reading 
version from side file is cheaper (read a single int from side file instead of 
parsing/reading from footer) isn't it?

> add acid version marker to acid files
> -------------------------------------
>                 Key: HIVE-18659
>                 URL: https://issues.apache.org/jira/browse/HIVE-18659
>             Project: Hive
>          Issue Type: Bug
>          Components: Transactions
>            Reporter: Eugene Koifman
>            Assignee: Eugene Koifman
>            Priority: Major
>         Attachments: HIVE-18659.01.patch
> add acid version marker to acid files so that we know which version of acid 
> wrote the file

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