Post by anushri on Jul 3, 2018 7:35:29 GMT
The three core methods of a Reducer are:
setup(): this method is used for configuring various parameters like input data size, distributed cache.
public void setup (context)
reduce(): heart of the reducer always called once per key with the associated reduced task
public void reduce(Key, Value, context)
cleanup(): this method is called to clean temporary files, only once at the end of the task
public void cleanup (context)
Devops training in Bangalore
setup(): this method is used for configuring various parameters like input data size, distributed cache.
public void setup (context)
reduce(): heart of the reducer always called once per key with the associated reduced task
public void reduce(Key, Value, context)
cleanup(): this method is called to clean temporary files, only once at the end of the task
public void cleanup (context)
Devops training in Bangalore