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From "Chris Nauroth (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HDFS-5202) umbrella JIRA for Windows support in HDFS caching
Date Fri, 13 Sep 2013 21:24:51 GMT

    [ https://issues.apache.org/jira/browse/HDFS-5202?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13766969#comment-13766969
] 

Chris Nauroth commented on HDFS-5202:
-------------------------------------

I don't think there are many platform-specific hurdles to implementing this feature on Windows.
 I can only think of a couple of issues:

# Windows does not have {{getrlimit}}, and I'm not aware of an equivalent.  I propose that
we stub the implementation on Windows to throw {{UnsupportedOperationException}} and add checks
to skip calling the method from Java on Windows.  This part is required before we merge the
feature branch back to trunk, because otherwise the codebase won't compile on Windows.
# {{mlock}} and {{munlock}} compile fine on Windows, but there is also {{VirtualLock}} and
{{VirtualUnlock}} in the Windows API, and I haven't been able to find documentation describing
whether or not the two sets of functions behave differently.  We need to figure out if there
is a compelling reason for a Windows-specific code path that uses {{VirtualLock}} and {{VirtualUnlock}}.
 This part can happen independently of the current feature work.
                
> umbrella JIRA for Windows support in HDFS caching
> -------------------------------------------------
>
>                 Key: HDFS-5202
>                 URL: https://issues.apache.org/jira/browse/HDFS-5202
>             Project: Hadoop HDFS
>          Issue Type: Improvement
>            Reporter: Colin Patrick McCabe
>
> This is an umbrella JIRA for adding Windows support for HDFS caching.

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