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From "Rui Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-14323) Reduce number of FS permissions and redundant FS operations
Date Wed, 27 Jul 2016 01:54:20 GMT

    [ https://issues.apache.org/jira/browse/HIVE-14323?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15394925#comment-15394925
] 

Rui Li commented on HIVE-14323:
-------------------------------

I see. Thanks Steve!

> Reduce number of FS permissions and redundant FS operations
> -----------------------------------------------------------
>
>                 Key: HIVE-14323
>                 URL: https://issues.apache.org/jira/browse/HIVE-14323
>             Project: Hive
>          Issue Type: Improvement
>            Reporter: Rajesh Balamohan
>            Assignee: Rajesh Balamohan
>            Priority: Minor
>         Attachments: HIVE-14323.1.patch, HIVE-14323.2.patch
>
>
> Some examples are given below.
> 1. When creating stage directory, FileUtils sets the directory permissions by running
a set of chgrp and chmod commands. In systems like S3, this would not be relevant.
> 2. In some cases, fs.delete() is followed by fs.exists(). In this case, it might be redundant
to check for exists() (lookup ops are expensive in systems like S3). 



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