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HADOOP - Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?




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asked SRVMTrainings February 5, 2013 02:11 AM  

Which interface needs to be implemented to create Mapper and Reducer for the Hadoop?


           

2 Answers



 
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Mapper and Reducer are abstract class.
We just need to extend Mapper and implement map method for Mapper and extend Reducer class and implement reduce method. No interfaces needed.
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answered By   0  
org.apache.hadoop.mapreduce.Mapper ( and ) org.apache.hadoop.mapreduce.Reducer
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