AWS Certified Cloud Practitioner
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There is a requirement to host a database server for a minimum period of one year. Which of the following would result in the least cost?
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A
Spot Instances
B
On-Demand
C
No Upfront costs Reserved
D
Partial Upfront costs Reserved
Explanation:
Explanation
For a database server that needs to run for a minimum of one year, Partial Upfront Reserved Instances provide the best cost optimization.
Cost Comparison:
- Spot Instances: Cheapest option but can be terminated at any time - not suitable for databases that require continuous availability
- On-Demand: Most expensive option with no long-term commitment
- No Upfront Reserved: Lower hourly rate than On-Demand but higher than Partial Upfront
- Partial Upfront Reserved: Provides the best discount among reserved instances options for one-year commitments
Why Partial Upfront is Best:
- Higher discount: AWS offers better pricing for partial upfront payments compared to no upfront
- Predictable costs: Fixed hourly rate for the entire term
- Suitable for long-term workloads: Perfect for databases that run continuously for extended periods
For workloads with predictable usage patterns lasting one year or more, Reserved Instances with partial upfront payment offer the most cost-effective solution while ensuring resource availability.
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