Answer:

Please design your partitioner with

the following

boundary:

If the first letter of a word is less than s, this word belongs to partition 1; otherwise, this word

belongs to partition 2. What are the partitions in the above example?

Partition 1:

Partition 2:

What are the outputs of reducer 1 and 2?

Reducer 1:

Reducer 2:

Suppose we add the combiner to the program. Can we use the code for the reducer as the combiner?

Answer:

Will the combiner helps improve the computing efficiency and why?

Answer:

How many combiners do we have?

Answer:

Please Indicate the output of the combiner.