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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12553958
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Runping Qi commented on HADOOP-1298:
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Since the file sizes to read/write are very small, the NNBench should not be
CPU bounded
on tasktracker nodes, whether you have e or 4 mappers per tracker. Increasing
the number of
mappers per task tracker will incease the load on the name node for sure.
If the goal is to test the maximum transaction rate of the namenode, then
increasing the
number of mappers per tracker and increasing the number of trackers is the
right approach.
> 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: Tsz Wo (Nicholas), SZE
> Attachments: 1298_2007-09-22_1.patch, 1298_2007-10-04_1.patch,
> 1298_20071220c.patch, hadoop-user-munncha.patch17,
> HDFSPermissionSpecification4.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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