[jira] Issue Comment Edited: (HADOOP-4747) Reuse FileStatus in FsShell where possible

["David Phillips (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HADOOP-4747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12652225#action_12652225 ] 

electrum edited comment on HADOOP-4747 at 12/1/08 5:04 PM:
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Change main ls() function and shellListStatus() to take a FileStatus rather than a Path.  shellListStatus() can return immediately if the FileStatus is not a directory.

This has significant speedups for -ls when globbing:

hadoop fs -ls /foo/  (fast)
hadoop fs -ls /foo/*.dat  (previously made a status call for every file)



      was (Author: electrum):
    Change main ls() function and shellListStatus() to take a FileStatus rather than a Path.  shellListStatus() can return immediately if the FileStatus is a directory.

This has significant speedups for -ls when globbing:

hadoop fs -ls /foo/  (fast)
hadoop fs -ls /foo/*.dat  (previously made a status call for every file)


  
> Reuse FileStatus in FsShell where possible
> ------------------------------------------
>
>                 Key: HADOOP-4747
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4747
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: fs
>    Affects Versions: 0.19.0
>            Reporter: David Phillips
>            Priority: Minor
>         Attachments: hadoop-fsshell-reuse-status.patch
>
>
> FsShell should reuse FileStatus objects instead of converting to a Path and making extra calls to the backend FS (which can be slow and expensive).

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