WHY A IS False? |
CONCEPT: On-Demand Instances & Spot Instances |
On-Demand Instances
- have the highest cost but no upfront payment.
- no long-term commitment.
Spot Instances
- Can get a discount of up to 90% compared to On-demand.
- Instances that you can “lose” at any point in time if your max price is less than the
current spot price.
- MOST cost-efficient instances in AWS
Here, the question specifically asks for a MOST cost-effective solution. So, provisioning the database using On-demand Instances is not definitely the correct option.
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WHY B IS False? |
CONCEPT: On-Demand Instances |
On-Demand Instances
- have the highest cost but no upfront payment.
- no long-term commitment.
Here, the question specifically asks for a MOST cost-effective solution. So, definitely not On-demand Instances. |
WHY C IS True? |
CONCEPT: Spot Instances & Reserved Instances |
Reserved instances
- Reserve a specific instance type.
- Up to 72% discount compared to On-demand.
- Recommended for steady-state usage applications (like a database)
Spot Instances
- Can get a discount of up to 90% compared to On-demand.
- Instances that you can “lose” at any point in time if your max price is less than the
current spot price.
- MOST cost-efficient instances in AWS
|
WHY D IS False? |
CONCEPT: On-Demand Instances & Spot Instances |
On-Demand Instances
- have the highest cost but no upfront payment.
- no long-term commitment.
Spot Instances
- Can get a discount of up to 90% compared to On-demand.
- Instances that you can “lose” at any point in time if your max price is less than the
current spot price.
- MOST cost-efficient instances in AWS
Here, the question specifically asks for a MOST cost-effective solution. So, provisioning the ECS cluster using On-demand Instances is not definitely the correct option.
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Short Trick |
- MOST cost-effective solution - Out of On-demand, Reserved & Spot, Spot Instances are the most cost-effective instances in AWS.
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References: |
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