How many Job Trackers can be found in a MapReduce v1 cluster?

How many Job Trackers can be found in a MapReduce v1 cluster?
A . One per cluster
B . One per data node
C . One for each Mapper
D . One for each Reducer

View Answer

Answer: A

Explanation:

Reference: https://www.cs.colorado.edu/~kena/classes/5448/s11/presentations/hadoop.pdf