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From "Ashutosh Chauhan (JIRA)" <>
Subject [jira] [Updated] (HIVE-3950) Remove code for merging files via MR job
Date Sun, 27 Jan 2013 04:49:12 GMT


Ashutosh Chauhan updated HIVE-3950:

    Attachment: hive-3950.patch

Attaching patch. Phabricator link:
> Remove code for merging files via MR job
> ----------------------------------------
>                 Key: HIVE-3950
>                 URL:
>             Project: Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Ashutosh Chauhan
>         Attachments: hive-3950.patch
> Hive can merge files either via MR job or via map only job. Obviously, doing it via map-only
job is more efficient, but there is an option of doing it via MR job as well because CombineFileInputFormat
is available only in hadoop-0.20 and later. Since, we no longer support hadoop versions earlier
than 20 anymore all that is now dead code, we should get rid of it.

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