What is the disadvantage of using multiple reducers with the default HashPartitioner and distributing your workload across you cluster?
A) You will not be able to compress the intermediate data.
B) You will longer be able to take advantage of a Combiner.
C) By using multiple reducers with the default HashPartitioner, output files may not be in globally sorted order.
D) There are no concerns with this approach. It is always advisable to use multiple reduces.

Question

Quizplus · Accepted Answer

Using multiple reducers with the default HashPartitioner can lead to output files that are not globally sorted because each reducer works on a separate partition of the data, and the default partitioning does not ensure global ordering across partitions.

What Is the Disadvantage of Using Multiple Reducers with the Default