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From "dhruba borthakur (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HADOOP-4044) Create symbolic links in HDFS
Date Thu, 13 Nov 2008 09:23:46 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

dhruba borthakur updated HADOOP-4044:
-------------------------------------

    Attachment: symLink12.patch

Incorporated Sanjay's review comments. The FileSystem.createSymLink() does take two parameters,
but only the first one needs to be "resolved". The second one can be anything (just a blob)
and does not need to be resolved. In fact, the second parameter could be a dangling non-existent
path.

Included test cases for all FileSystem APIs that were modified. 

>From Rob''s list of tests
    *  Shell commands  -- unit test included
    * Trash -- unit test included (because Trash is a pure FileSystem client)
    * Archives -- current implementation does not follow symbolic links. 
    * distcp -- pure FileSystem client, does not follow symbolic links 
    * chmod, chown, chgrp APIs -- unit test included
    * Rename - unit test included


> 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: 4044_20081030spi.java, HADOOP-4044-strawman.patch, symLink1.patch,
symLink1.patch, symLink11.patch, symLink12.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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