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https://issues.apache.org/jira/browse/HDFS-9568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15061173#comment-15061173
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Allen Wittenauer commented on HDFS-9568:
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(As a sidenote, I find this hilarious:

The previously required LIPKEY and SPKM-3 security mechanisms have been removed.

I seem to recall the story behind these requirements was that they were 
intended for non-Kerberized environments. But the reality was that no one ever 
implemented them because the places that cared already had Kerberos deployed.  
There might have been a 'play' implementation of LIPKEY internally, but I don't 
think it ever saw the light of day.  Which means that, officially, no one ever 
really qualified as being fully RFC3530 compliant, including Sun!)

> Support NFSv4 interface to HDFS
> -------------------------------
>
>                 Key: HDFS-9568
>                 URL: https://issues.apache.org/jira/browse/HDFS-9568
>             Project: Hadoop HDFS
>          Issue Type: New Feature
>          Components: nfs
>            Reporter: John Zhuge
>            Assignee: John Zhuge
>
> [HDFS-4750|https://issues.apache.org/jira/browse/HDFS-4750] added NFSv3 
> interface to HDFS. As NFSv4 client support in many OSes has matured, we can 
> addd NFSv4 interface to HDFS. There are some NFSv4 features quite suitable in 
> Hadoop's distributed environment in addition to simplified configuration and 
> added security.
> This JIRA is to track NFSv4 support to access HDFS.
> We will upload the design doc and then the initial implementation.



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