SAP-C02 Question 289
Select 3Your organization is running a large-scale data analytics application on Amazon EC2 instances. You are frequently launching On-Demand instances across multiple Availability Zones in a region. Recently, your application started experiencing launch failures due to instance limits being exceeded. As the Solutions Architect, how should you address this issue to ensure your application scales without interruption?
- A
Request a service quota increase for On-Demand instances from the AWS Service Quotas console.
- B
Distribute your instance launches across additional AWS regions to reduce the load on a single region.
- C
Implement an Auto Scaling group with Spot Instances to reduce dependency on On-Demand instance limits.
- D
Use the AWS Trusted Advisor to identify and resolve service quota limits proactively.
- E
Migrate to Reserved Instances to avoid On-Demand instance limits.
Show answer and explanation
Correct answers: A, C, D
Explanation
When encountering service quota limits, the most effective solutions involve requesting a service quota increase, leveraging alternative instance types like Spot Instances, and using tools like AWS Trusted Advisor to monitor and manage service limits. These approaches ensure scalability and prevent service disruptions. Distributing workloads across regions or switching pricing models without addressing the core quota issue does not resolve the problem effectively.
- A. Correct.
Requesting a service quota increase is the most direct solution when encountering limits on On-Demand instances in a region. Quotas can be increased by submitting a request through the AWS Service Quotas console.
- B. Incorrect.
Distributing instance launches across multiple AWS regions is not a practical solution in this scenario, as it introduces complexity, latency, and potential data replication challenges. The issue is regional instance limits, not regional availability.
- C. Correct.
Using Spot Instances with an Auto Scaling group can help reduce reliance on On-Demand instances, as Spot Instances have separate quotas and can often fulfill capacity needs cost-effectively.
- D. Correct.
AWS Trusted Advisor provides insights into service quota limits, and its proactive recommendations can help identify and resolve issues before they impact application performance.
- E. Incorrect.
Migrating to Reserved Instances does not solve the issue, as Reserved Instances are subject to the same regional On-Demand instance limits when initially launched. Reserved Instances are a pricing model, not a technical solution to quota limits.