ExpertEasy1 markMultiple Choice
AWS SAP-C02 · Question 31 · Domain 3.5: Cost Optimization
A data engineering team uses Amazon EMR for big data processing. The clusters are transient; they are spun up daily, process data for 4 hours, and are then terminated. The workload is fault-tolerant and can handle node interruptions. What is the MOST cost-effective EC2 purchasing option for the EMR task nodes?
A data engineering team uses Amazon EMR for big data processing. The clusters are transient; they are spun up daily, process data for 4 hours, and are then terminated. The workload is fault-tolerant and can handle node interruptions. What is the MOST cost-effective EC2 purchasing option for the EMR task nodes?
Answer options:
A.
On-Demand Instances
B.
Reserved Instances
C.
Spot Instances
D.
Dedicated Hosts
How to approach this question
Match the workload characteristics (fault-tolerant, transient) to the pricing model.
Full Answer
C.Spot Instances✓ Correct
Spot Instances
Amazon EC2 Spot Instances let you take advantage of unused EC2 capacity at steep discounts. Because EMR task nodes only process data and do not store HDFS data, they are fault-tolerant and perfect for Spot Instances.
Common mistakes
Choosing RIs for a workload that only runs 4 hours a day.
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