Explain the main methods of reducer.

1.	Explain the main methods of reducer.
Answer» These are the main METHODS of reducer: setup(): This COMMAND is used to specify parameters such as the size of input data and the distributed cache. cleaning(): is a function for DELETING temporary files. reduce(): it's CALLED once per key with the CORRESPONDING reduced task.

Answer»

These are the main METHODS of reducer:

setup(): This COMMAND is used to specify parameters such as the size of input data and the distributed cache.
cleaning(): is a function for DELETING temporary files.
reduce(): it's CALLED once per key with the CORRESPONDING reduced task.

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