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https://issues.apache.org/jira/browse/HADOOP-834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12550766
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dhruba borthakur commented on HADOOP-834:
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Hello Craig,
Thanks for the excellent writeup. I get the entire picture now.
I think it is a good idea to go the remotetea-approach, especially because it
might help in moving to NFSv4 when appropriate. However, the downside is that
remotetea has a LGPL license; that means it is incompatible with the Apache
license. This, in turn, means that the nfs-server-extensions-to-HDFS cannot be
compiled as part of a regular HADOOP distribution. Of course, an end-user can
always download remote-tea and recompile a hadoop distribution from source.
NFS clients typically do appending-writes while creating the file for the first
time. So, HADOOP-1700 might satisfy your requirements for a while.
thanks,
dhruba
> Export the HDFS file system through a NFS protocol
> --------------------------------------------------
>
> Key: HADOOP-834
> URL: https://issues.apache.org/jira/browse/HADOOP-834
> Project: Hadoop
> Issue Type: New Feature
> Components: dfs
> Reporter: dhruba borthakur
> Assignee: 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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