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https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12638584#action_12638584
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Sanjay Radia commented on HADOOP-4044:
--------------------------------------

Owen, my first instinct was to implement it the way you suggested. However, one 
you add  loop detection you may want to consider using the structure similar 
the one that Dhruba used to share that code. The addition of FOOImpl for each 
method does clutter the FileSystem code.
Doug's suggestion of LinkableFileSystem is interesting, Not I don't think this 
is unique to HDFS. KFS may want to support this,
BTW  the local file system will want to support the normal dot-relative 
symlinks but perhaps not the remote one (ie the mounts ). So Linkable is not 
quite the distinction. (but that is just a question of naming).


> Create symbolic links in HDFS
> -----------------------------
>
>                 Key: HADOOP-4044
>                 URL: https://issues.apache.org/jira/browse/HADOOP-4044
>             Project: Hadoop Core
>          Issue Type: New Feature
>          Components: dfs
>            Reporter: dhruba borthakur
>            Assignee: dhruba borthakur
>         Attachments: symLink1.patch, symLink1.patch, symLink4.patch, 
> symLink5.patch, symLink6.patch, symLink8.patch, symLink9.patch
>
>
> HDFS should support symbolic links. A symbolic link is a special type of file 
> that contains a reference to another file or directory in the form of an 
> absolute or relative path and that affects pathname resolution. Programs 
> which read or write to files named by a symbolic link will behave as if 
> operating directly on the target file. However, archiving utilities can 
> handle symbolic links specially and manipulate them directly.

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