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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12554849
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Hairong Kuang commented on HADOOP-1298:
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The sort on 500 node cluster shows that running sort with permission checking
turning on takes 5245s while sorting with trunk takes 5074s. This represents a
3.3% performance decrease. The NNBench program seems to have a problem. It can
not been run on a 500 node cluster.
> 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
> Affects Versions: 0.16.0
> Reporter: Kurtis Heimerl
> Assignee: Tsz Wo (Nicholas), SZE
> Fix For: 0.16.0
>
> Attachments: 1298_2007-09-22_1.patch, 1298_2007-10-04_1.patch,
> 1298_20071221b.patch, 1298_20071228s.patch, hadoop-user-munncha.patch17,
> HDFSPermissionSpecification5.pdf
>
>
> 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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