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