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