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Posted to issues@hive.apache.org by "t oo (JIRA)" <ji...@apache.org> on 2019/03/29 11:24:00 UTC

[jira] [Commented] (HIVE-14165) Remove Hive file listing during split computation

    [ https://issues.apache.org/jira/browse/HIVE-14165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16804833#comment-16804833 ] 

t oo commented on HIVE-14165:
-----------------------------

gentle ping

> Remove Hive file listing during split computation
> -------------------------------------------------
>
>                 Key: HIVE-14165
>                 URL: https://issues.apache.org/jira/browse/HIVE-14165
>             Project: Hive
>          Issue Type: Sub-task
>    Affects Versions: 2.1.0
>            Reporter: Abdullah Yousufi
>            Assignee: Sahil Takiar
>            Priority: Major
>         Attachments: HIVE-14165.02.patch, HIVE-14165.03.patch, HIVE-14165.04.patch, HIVE-14165.05.patch, HIVE-14165.06.patch, HIVE-14165.07.patch, HIVE-14165.patch
>
>
> The Hive side listing in FetchOperator.java is unnecessary, since Hadoop's FileInputFormat.java will list the files during split computation anyway to determine their size. One way to remove this is to catch the InvalidInputFormat exception thrown by FileInputFormat#getSplits() on the Hive side instead of doing the file listing beforehand.
> For S3 select queries on partitioned tables, this results in a 2x speedup.



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