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Date: Mon, 6 Oct 2008 18:59:44 -0700 (PDT)
From: "Konstantin Shvachko (JIRA)" <jira@apache.org>
To: core-dev@hadoop.apache.org
Subject: [jira] Commented: (HADOOP-4044) Create symbolic links in HDFS
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    [ https://issues.apache.org/jira/browse/HADOOP-4044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12637348#action_12637348 ] 

Konstantin Shvachko commented on HADOOP-4044:
---------------------------------------------

Owen is proposing a reasonable rename of the FSLink*** classes. But the implementations of these classes remain the same.
Going further this way we could make the API look like this:
{code}
RenameReply rename(RenameRequest arg) throws IOException;
{code}
This is universal, but not a transparent api anymore.
The next step to completely generalize (and exaggerate)  this would be to declare one single protocol method.
{code}
Reply execute(enum opCode, Request arg) throws IOException;
{code}
Then the api will have to be defined by a pair of Request, Reply classes.

> 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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