During the execution of a MapReduce v2 (MRv2) job on YARN, where does the Mapper
place the intermediate data of each Map Task?
A.
The Mapper stores the intermediate data on the node running the Job’s
ApplicationMaster so that it is available to YARN ShuffleService before the data is
presented to the Reducer
B.
The Mapper stores the intermediate data in HDFS on the node where the Map tasks ran
in the HDFS /usercache/&(user)/apache/application_&(appid) directory for the user who ran
the job
C.
The Mapper transfers the intermediate data immediately to the reducers as it is
generated by the Map Task
D.
YARN holds the intermediate data in the NodeManager’s memory (a container) until it is
transferred to the Reducer
E.
The Mapper stores the intermediate data on the underlying filesystem of the local disk in
the directories yarn.nodemanager.locak-DIFS
E
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E is the currect one
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E
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and the parameter is mispelled. the correct name is yarn.nodemanager.local-dirs
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E
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thom is correct
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