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From "Colin Patrick McCabe (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HADOOP-9981) Listing in RawLocalFileSystem is inefficient
Date Tue, 24 Sep 2013 17:06:12 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-9981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Colin Patrick McCabe updated HADOOP-9981:
-----------------------------------------

    Assignee: Colin Patrick McCabe
      Status: Patch Available  (was: Open)
    
> Listing in RawLocalFileSystem is inefficient
> --------------------------------------------
>
>                 Key: HADOOP-9981
>                 URL: https://issues.apache.org/jira/browse/HADOOP-9981
>             Project: Hadoop Common
>          Issue Type: Bug
>    Affects Versions: 2.3.0
>            Reporter: Kihwal Lee
>            Assignee: Colin Patrick McCabe
>            Priority: Critical
>         Attachments: HADOOP-9981.001.patch
>
>
> After HADOOP-9652, listStatus() or globStatus() calls against a local file system directory
is very slow.  A user was loading data from local file system to Hive and it took about 30
seconds. The same operation took less than a second pre-HADOOP-9652. 
> The input path had many other files beside the input files and strace showed that fork
& exec of stat against each and every one of them. jstack confirmed that this was being
done from getNativeFileLinkStatus().

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