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https://issues.apache.org/jira/browse/HDFS-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12758028#action_12758028
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Konstantin Shvachko commented on HDFS-245:
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Yes (IV) is an optimization of (I).
I first thought getStatus() is the same as getLinkTarget(), but may be it's
not, because we don't know which part of the path is a link.
If the link is in the middle of the src path, then having getFileStatus(src)
return a FileStatus of the link inside instead of the status of the intended
file may be confusing.
So the idea of having a separate getLinkTarget() is that it can return the
target of the link along with the portion of the path, which points to the link.
> Create symbolic links in HDFS
> -----------------------------
>
> Key: HDFS-245
> URL: https://issues.apache.org/jira/browse/HDFS-245
> Project: Hadoop HDFS
> Issue Type: New Feature
> Reporter: dhruba borthakur
> Assignee: Eli Collins
> Attachments: 4044_20081030spi.java, HADOOP-4044-strawman.patch,
> symlink-0.20.0.patch, symLink1.patch, symLink1.patch, symLink11.patch,
> symLink12.patch, symLink13.patch, symLink14.patch, symLink15.txt,
> symLink15.txt, 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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