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https://issues.apache.org/jira/browse/HADOOP-7834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14320724#comment-14320724
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Chris Nauroth commented on HADOOP-7834:
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Another potential use for this is preallocation of space in the NameNode edit
log. (See {{EditLogFileOutputStream#preallocate}}.)
> Support posix_fallocate in NativeIO and add call from DataNode code
> -------------------------------------------------------------------
>
> Key: HADOOP-7834
> URL: https://issues.apache.org/jira/browse/HADOOP-7834
> Project: Hadoop Common
> Issue Type: Sub-task
> Components: io, native, performance
> Reporter: Sriram Rao
> Assignee: Liang Xie
>
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