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HDFS, by default, replicates each data block _____ times on different nodes and on at least ____ racks.

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HDFS, by default, replicates each data block _____ times on different nodes and on at least ____ racks.

(a) 3, 2

(b) 1, 2

(c) 2, 3

(d) All of the mentioned

I have been asked this question in unit test.

My doubt is from Data Integrity in division Hadoop I/O of Hadoop

1 Answer

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The correct choice is (a) 3, 2

The best I can explain: HDFS has a simple yet robust architecture that was explicitly designed for data reliability in the face of faults and failures in disks, nodes and networks.

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