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https://issues.apache.org/jira/browse/HADOOP-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12496952
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Konstantin Shvachko commented on HADOOP-1298:
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Sorry, don't have bandwidth to go deep in it. Dhruba is going to review this.
I have a couple of wishes:
# If possible it would be good to make the file status *_extensible_*. We will
probably want to introduce different file attributes in the future.
Creation time is going to be one of the nearest additions, and if we want to
add compressed/uncompressed flag, or the number of records
in the file, or any other attributes in the future we should be able to do that
in a generic way with minimal changes in the name-node code
and ClientProtocol, just by providing a proper interface on the client side.
Particularly, this implies that we should have more generic
*_protocol_* methods, like getStatus() and changeStatus(), rather than
introducing getters and setters for every new attribute.
# All data-structures introduced on the name-node should be very *_space
efficient_*. Using bits was a good decision. Lets take a closer
look on what should/could be optimized even further. Especially the
*_defaults_*, in which case we want almost no overhead compared to
the pre-permissions version.
> 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,
> hadoop-user-munncha.patch, hadoop-user-munncha.patch10,
> hadoop-user-munncha.patch11, hadoop-user-munncha.patch12,
> hadoop-user-munncha.patch13, hadoop-user-munncha.patch14,
> hadoop-user-munncha.patch15, hadoop-user-munncha.patch16,
> hadoop-user-munncha.patch4, hadoop-user-munncha.patch5,
> hadoop-user-munncha.patch6, hadoop-user-munncha.patch7,
> hadoop-user-munncha.patch8, hadoop-user-munncha.patch9
>
>
> 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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