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https://issues.apache.org/jira/browse/HDFS-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12759303#action_12759303
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Sanjay Radia commented on HDFS-245:
-----------------------------------
@doug
>If we're really on the verge of deprecating FileSystem (HADOOP-6223) then
>perhaps we should not invest effort adding new features there. ...
I think Facebook was hoping to use this to replace their internal patch which
uses file system. Your thoughts Dhruba?
Where should the patch go in the new stack (FileContext, AbstractFileSystem)?
I believe it belongs inside the FileContext layer (or at least above the
AbstractFileSystem layer) since it is FileContext layer that understand the
global URI name space. Each AbstractFileSystem deals with only
its local namespace within the filesystem and hence it is "wrong" for the
AbstractFileSystem to follow symlinks to a foreign location.
> MountPointException would be better named something like
> UnresolvedLinkException. ...
Agreed.
> 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: dhruba borthakur
> Attachments: 4044_20081030spi.java, designdocv1.txt,
> 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, symlink16-common.patch,
> symlink16-hdfs.patch, symlink16-mr.patch, symlink17-common.txt,
> symlink17-hdfs.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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