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Posted to common-issues@hadoop.apache.org by "Colin Patrick McCabe (JIRA)" <ji...@apache.org> on 2013/09/25 20:20:04 UTC

[jira] [Updated] (HADOOP-9981) globStatus should minimize its listStatus and getFileStatus calls

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

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

    Summary: globStatus should minimize its listStatus and getFileStatus calls  (was: Listing in RawLocalFileSystem is inefficient)
    
> globStatus should minimize its listStatus and getFileStatus calls
> -----------------------------------------------------------------
>
>                 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, HADOOP-9981.002.patch, HADOOP-9981.003.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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