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From "Hua Wei" <sinic....@gmail.com>
Subject 2 questions about hadoopifying
Date Wed, 19 Mar 2008 14:44:48 GMT

I got 2 questions when hadoopifying my old programs.

1. How to access an exterior configuration file (not an input file) in
mapper class? Every mapper need to read this XML file for parameters.
Is there a solution to this?
2. Is there any limitation about what kind of data structures can be
used in a mapper or reducer class? Say, can hashMap or self-defined
class be used within a mapper class?

I am new to hadoop. Any response would be appreciated.

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