Your Hadoop cluster has 25 nodes with a total of 100 TB (4 TB per node) of raw disk space
allocated HDFS storage. Assuming Hadoop’s default configuration, how much data will you be
able to store?
A.
Approximately 100TB
B.
Approximately 25TB
C.
Approximately 10TB
D.
Approximately 33 TB
Explanation:
In default configuration there are total 3 copies of a datablock on HDFS, 2 copies
are stored on datanodes on same rack and 3rd copy on a different rack.
24 Interview Questions & Answers for Hadoop MapReduce developers, How the
HDFS Blocks are replicated?