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From "Aaron Kimball (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5958) Use JDK 1.6 File APIs in DF.java wherever possible
Date Thu, 22 Oct 2009 21:55:59 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12768930#action_12768930
] 

Aaron Kimball commented on HADOOP-5958:
---------------------------------------

I'm not an interface fan myself. But the existing {{DF}} class already uses {{Shell}} as an
abstract base class. That means we'd need to put most of the current DF's logic into some
other class that extends Shell; maybe a private inner class?

+1 for a factory method.

> Use JDK 1.6 File APIs in DF.java wherever possible
> --------------------------------------------------
>
>                 Key: HADOOP-5958
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5958
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: fs
>            Reporter: Devaraj Das
>             Fix For: 0.21.0
>
>
> JDK 1.6 has File APIs like File.getFreeSpace() which should be used instead of spawning
a command process for getting the various disk/partition related attributes. This would avoid
spikes in memory consumption by tasks when things like LocalDirAllocator is used for creating
paths on the filesystem.

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