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From "Kurtis Heimerl (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-1298) adding user info to file
Date Thu, 26 Apr 2007 00:42:15 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12491854
] 

Kurtis Heimerl commented on HADOOP-1298:
----------------------------------------

Fixed the patch, now has user.java. 

I am aware of the performance penalties. However, the common case does not have a ton of INodes
anyhow, as a distributed file system tends to have a smaller amount of very large files. 

Also, at this point it's more of a design specification anyhow. The optimizations can happen
later, perhaps keeping a global string area to remove any duplicates. It wouldn't be hard
to implement this in a hashtable. 

> 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
>         Attachments: hadoop-user-munncha.patch, hadoop-user-munncha.patch
>
>
> 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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