SAA-C03 · Question #575
A company deploys an application on Amazon EC2 Spot Instances. The company observes frequent unavailability issues that affect the application's output. The application instances all use the same…
The correct answer is A. Create an EC2 Auto Scaling group that includes a mix of Spot Instances and a base number of D. Specify similarly sized instance types and Availability Zones for the Spot Instances. F. Use the price capacity optimized strategy for Spot Instances. AWS Spot best practices recommend diversifying capacity across multiple instance types and Availability Zones and using the capacity-optimized (price-capacity-optimized) allocation strategy to choose pools with the deepest capacity for higher availability. Adding a small…
Question
A company deploys an application on Amazon EC2 Spot Instances. The company observes frequent unavailability issues that affect the application's output. The application instances all use the same instance type in a single Availability Zone. The application architecture does not require the use of any specific instance family. The company needs a solution to improve the availability of the application. Which combination of steps will meet this requirement MOST cost-effectively? (Select THREE.)
Options
- ACreate an EC2 Auto Scaling group that includes a mix of Spot Instances and a base number of
- BCreate EC2 Capacity Reservations.
- CUse the lowest price allocation strategy for Spot Instances.
- DSpecify similarly sized instance types and Availability Zones for the Spot Instances.
- EUse a different instance type for the web application.
- FUse the price capacity optimized strategy for Spot Instances.
How the community answered
(47 responses)- A49% (23)
- B17% (8)
- C28% (13)
- E6% (3)
Explanation
AWS Spot best practices recommend diversifying capacity across multiple instance types and Availability Zones and using the capacity-optimized (price-capacity-optimized) allocation strategy to choose pools with the deepest capacity for higher availability. Adding a small On-Demand base in the Auto Scaling group maintains steady, uninterrupted baseline processing while keeping costs low and absorbing Spot interruptions. Option C (lowest price) increases interruption risk. Capacity Reservations (B) target On-Demand capacity guarantees and add cost, not needed for Spot-based elasticity. Option E is redundant; diversification is already achieved with (D). This combination maximizes resiliency of Spot workloads while preserving strong cost efficiency and aligns with AWS guidance for fault-tolerant, stateless applications on Spot.
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