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?

The correct answer is D. Approximately 33 TB. 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. HDFS Blocks are replicated?

Solution Evaluation

Question

Options

AApproximately 100TB
BApproximately 25TB
CApproximately 10TB
DApproximately 33 TB

How the community answered

(45 responses)

A
13% (6)
B
2% (1)
C
7% (3)
D
78% (35)

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. HDFS Blocks are replicated?

Topics

#HDFS Storage Capacity#Replication Factor#Hadoop Default Configuration#Capacity Planning

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