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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12533265
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Christophe Taton commented on HADOOP-1298:
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I'll add a new kind of ticket which holds a user name instead of a user id. 
Should I enhance the DFSClient to set the user name as specified in the 
Configuration, or the current user id, if nothing is specified?

If the user name is not in the user.database.file, any operation will fail 
(throws an IOException as a result of not being able to resolve the name into 
an id).
This makes the system quite static. Can we assume, for now at least, that users 
will not be created/removed everyday?


> 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_2007-09-22_1.patch, 1298_2007-10-04_1.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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