Suji,
I'm only a couple of months in to using Map/Reduce, but I think you have a
couple of issues.
What do you mean by 'security'? ('Security' can mean different things to
different people.)
Map/Reduce works at the 'row' level.
So if you were to encrypt the data, you'd have to encrypt it on a row by row
basis and you'd have to work out how you recognize the end of each 'row'.
Then in the map() method, you'd have to decrypt, do something, and encrypt the
data output.
In your reduce() method, you'd have to decrypt, do something and then encrypt
the data output.
This will secure your data. How well will be determined by how you design your
map reduce jobs.
HTH
-Mike
-----Original Message-----
From: Sujitha [mailto:gs...@tce.edu]
Sent: Monday, March 01, 2010 1:15 AM
To: common-dev@hadoop.apache.org
Subject: Map-Reduce for Security
Hi all,
In order to secure the content of HDFS is it right encrypting and
compressing data before storing it.
Is there any way to use map reduce for securing data in hadoop?
thanks
Regards
Suji
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