I would like to start a Map-Reduce job that does not read data from an input 
file or from a database.  I would like to pass 3 arguments to the Mapper & 
Reducer to work on.  Basically, these arguments are keys on the 3 different 
tables on HBase.

In other words, I don't want to use FileInputFormat or DbInputFormat because 
everything I need is already on HBase. 

How can I do this?  Please let me know.  Thanks.




      

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