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Hadoop >> mail # user >> Security at file level in Hadoop


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Re: Security at file level in Hadoop
HDFS supports POSIX style file and directory permissions (read, write, execute) for the owner, group and world. You can change the permissions with hadoop fs -chmod <permissions> <path>

-Joey
On Feb 22, 2012, at 5:32, <[EMAIL PROTECTED]> wrote:

> Hi
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> I want to implement security at file level in Hadoop, essentially
> restricting certain data to certain users.
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> Ex - File A can be accessed only by a user X
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> File B can be accessed by only user X and user Y
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> Is this possible in Hadoop, how do we do it? At what level are these
> permissions applied (before copying to HDFS or after putting in HDFS)?
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> When the file gets replicated does it retain these permissions?
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> Thanks
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> Shreya
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>
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