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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-4044) Create symbolic links in HDFS
Date Thu, 11 Sep 2008 23:35:44 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12630421#action_12630421
] 

dhruba borthakur commented on HADOOP-4044:
------------------------------------------

So folks, 

Proposal1 : Do you think that it is a good idea to put in a subset of the full symlink functionality
(without support for symlinks to directories) as a first cut? And then, if a use case arises,
we can do the full symlink functionality at a later date.

Proposal 2: Proposal 1 + if the symlink is for a pathname in the same namenode, then the namenode
will resolve the symlink transparently. This will allow symbolic links to directories that
point to paths inside the same namenode.

Please respond by putting +1/-1/0 for the two proposals. The reason I am not implementing
the full set of functionality right now is because 0.19 cutoff data is only a few days away!

> 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
>
>
> 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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