When using MapReduce,best practices suggest that the number of mappers on a given node should be:
A)100 or more
B)100 or less
C)50 or less
D)at least 300

Question

Quizplus · Accepted Answer

The best practice suggests that the number of mappers on a given node should be 100 or less. It is because having too many mappers on a single node can cause the node to run out of memory, resulting in performance degradation. It is also recommended to tune the number of mappers based on the available resources and the size of the input data.

When Using MapReduce,best Practices Suggest That the Number of Mappers