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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-834) Export the HDFS file system through a NFS protocol
Date Mon, 18 Dec 2006 07:45:23 GMT
Export the HDFS file system through a NFS protocol

                 Key: HADOOP-834
                 URL: http://issues.apache.org/jira/browse/HADOOP-834
             Project: Hadoop
          Issue Type: New Feature
          Components: dfs
            Reporter: dhruba borthakur
         Assigned To: dhruba borthakur
         Attachments: nfshadoop.tar.gz

It would be nice if can expose the HDFS filesystem using the NFS protocol.

There are a couple of options that I could find:
1. Use a user space C-language-implementation of a NFS server and then use the libhdfs API
to integrate that code with Hadoop. There is such an implementation available at http://sourceforge.net/project/showfiles.php?group_id=66203.

2.  Use a user space Java implementation of a NFS server and then integrate it with HDFS using
Java API. There is such an implementation of NFS server at http://void.org/~steven/jnfs/.

I have experimented with Option 2 and have written a first version of the Hadoop integration.
I am attaching the code for your preliminary feedback. This implementation of the Java NFS
server has one limitation: it supports UDP only. Some licensing issues will have to be sorted
out before it can be used.  Steve (the writer of the NFS server implemenation) has told me
that he can change the licensing of the code if needed.


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