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Which of the following is the correct way to calculate total storage needed for a Hadoop cluster with 10 TB data and replication factor 3?

easy📝 Conceptual Q12 of 15
Hadoop - Cluster Administration
Which of the following is the correct way to calculate total storage needed for a Hadoop cluster with 10 TB data and replication factor 3?
A10 TB * 3 = 30 TB
B10 TB / 3 = 3.33 TB
C10 TB + 3 = 13 TB
D10 TB - 3 = 7 TB
Step-by-Step Solution
Solution:

  1. Step 1: Understand replication factor meaning

    Replication factor 3 means each data block is stored 3 times for fault tolerance.

  2. Step 2: Calculate total storage

    Total storage = original data size * replication factor = 10 TB * 3 = 30 TB.

  3. Final Answer:

    10 TB * 3 = 30 TB -> Option A

  4. Quick Check:

    Storage needed = data size x replication factor [OK]
Quick Trick: Multiply data size by replication factor [OK]
Common Mistakes:
  • Dividing instead of multiplying
  • Adding or subtracting replication factor incorrectly
  • Ignoring replication factor

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