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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12528826
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Doug Cutting commented on HADOOP-1298:
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Sameer: I share your efficiency concerns, I just wanted to note that
connection-oriented authentication may require considerable changes to our use
of RPC, and thus has a non-trivial implementation cost. The current proposal,
adding parameters, can be tested and developed without reworking the RPC
system, which is a significant advantage. We may find that it underperforms on
large clusters, and, until that is fixed (perhaps by per-connection
authentication) we may not deploy a ticket mechanism that uses encryption on
large clusters. We change RPC protocol versions nearly every release anyway,
so I don't see that as a major cost.
So we might protototype and benchmark w/ tickets as parameters, then decide
whether we need to move to connection-based authentication before we commit.
As a micro benchmark, we could measure how many tickets can be validated per
second and compare that to our expected RPC rates.
> 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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