On a cluster running MapReduce v2 (MRv2) on YARN, a MapReduce job is given a
directory of 10 plain text files as its input directory. Each file is made up of 3 HDFS blocks.
How many Mappers will run?
A.
10
B.
We cannot say; the number of mappers is determined by the ApplicationMaster
C.
3
D.
We cannot say; the number of Mappers is determined by the developer
E.
We cannot say; the number of Mappers is determined by the ResourceManager
F.
30
F
0
0
F is correct answer
0
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A
0
0
Number of Mappers depends on the number of splits
10files x 3 splits
0
0
F
0
0
F is the right answer, as no where a replication factor of 3 is mentioned in the question.
0
0