Shuffle traffic between mappers and reducers is saturating municipal cluster links during a large MapReduce job. Which performance lever directly targets intermediate map output size on the wire?
Select an answer to reveal the explanation.
Short Explanation
Smaller packages move through the tunnel faster. Compressing map output shrinks shuffle traffic on busy city networks. Adding skew or printing paper dumps makes things worse.
Full Explanation
Compressing intermediate map outputs is a recognized MapReduce performance lever that reduces shuffle network volume at the cost of CPU for compress/decompress. It addresses bandwidth saturation without changing business logic. Increasing skew or removing reducers harms job health rather than helping transfer efficiency.