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From "Chris Douglas (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1298) adding user info to file
Date Thu, 13 Sep 2007 19:05:33 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12527221
] 

Chris Douglas commented on HADOOP-1298:
---------------------------------------

A directory is 'navigable' iff its executable bit is set. A good example is a bin directory
in a user's home. They might not want people to list the contents of their home directory,
but they want to share binaries they've built in /home/foouser/bin. They can set /home/foouser
to 0711 and /home/foouser/bin to 0755 to effect this. In HDFS, this might be a common directory
"/foo/bar/upload" with different users/groups able to list the contents of a subset of known
subdirectories, but they would be prevented from listing the contents of /foo/bar/upload.

> adding user info to file
> ------------------------
>
>                 Key: HADOOP-1298
>                 URL: https://issues.apache.org/jira/browse/HADOOP-1298
>             Project: Hadoop
>          Issue Type: New Feature
>          Components: dfs, fs
>            Reporter: Kurtis Heimerl
>            Assignee: Christophe Taton
>             Fix For: 0.15.0
>
>         Attachments: 1298_2007-09-06b.patch, 1298_2007-09-07g.patch, hadoop-user-munncha.patch17
>
>
> I'm working on adding a permissions model to hadoop's DFS. The first step is this change,
which associates user info with files. Following this I'll assoicate permissions info, then
block methods based on that user info, then authorization of the user info. 
> So, right now i've implemented adding user info to files. I'm looking for feedback before
I clean this up and make it offical. 
> I wasn't sure what release, i'm working off trunk. 

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