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.