Increase number of Hive mappers in Hadoop 2

Question

I created a HBase table from Hive and I\'m trying to do a simple aggregation on it. This is my Hive query:

from my_hbase_table 
select col1, count(1) 
group by c         


        

Answer 1

Reduce the input split size from the default value. The mappers will get increased.

SET mapreduce.input.fileinputformat.split.maxsize;