You are configuring a cluster running HDFS, MapReduce version 2 (MRv2) on YARN
running Linux. How must you format the underlying filesystem of each DataNode?
A.
They must not formatted – – HDFS will format the filesystem automatically
B.
They may be formatted in any Linux filesystem
C.
They must be formatted as HDFS
D.
They must be formatted as either ext3 or ext4
B
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D is right. Cloudera recommends ext3 or ext4.
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