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Question 708 - SAA-C03 discussion

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A company's application is running on Amazon EC2 instances within an Auto Scaling group behind an Elastic Load Balancing (ELB) load balancer Based on the application's history, the company anticipates a spike in traffic during a holiday each year. A solutions architect must design a strategy to ensure that the Auto Scaling group proactively increases capacity to minimize any performance impact on application users.

Which solution will meet these requirements?

A.
Create an Amazon CloudWatch alarm to scale up the EC2 instances when CPU utilization exceeds 90%.
Answers
A.
Create an Amazon CloudWatch alarm to scale up the EC2 instances when CPU utilization exceeds 90%.
B.
Create a recurring scheduled action to scale up the Auto Scaling group before the expected period of peak demand
Answers
B.
Create a recurring scheduled action to scale up the Auto Scaling group before the expected period of peak demand
C.
Increase the minimum and maximum number of EC2 instances in the Auto Scaling group during the peak demand period
Answers
C.
Increase the minimum and maximum number of EC2 instances in the Auto Scaling group during the peak demand period
D.
Configure an Amazon Simple Notification Service (Amazon SNS) notification to send alerts when there are autoscaling:EC2_INSTANCE_LAUNCH events.
Answers
D.
Configure an Amazon Simple Notification Service (Amazon SNS) notification to send alerts when there are autoscaling:EC2_INSTANCE_LAUNCH events.
Suggested answer: B

Explanation:

Understanding the Requirement: The company anticipates a spike in traffic during a holiday and wants to ensure the Auto Scaling group can handle the increased load without impacting performance.

Analysis of Options:

CloudWatch Alarm: This reacts to spikes based on metrics like CPU utilization but does not proactively scale before the anticipated demand.

Recurring Scheduled Action: This allows the Auto Scaling group to scale up based on a known schedule, ensuring additional capacity is available before the expected spike.

Increase Min/Max Instances: This could result in unnecessary costs by maintaining higher capacity even when not needed.

SNS Notification: Alerts on scaling events but does not proactively manage scaling to prevent performance issues.

Best Solution for Proactive Scaling:

Create a recurring scheduled action: This approach ensures that the Auto Scaling group scales up before the peak demand, providing the necessary capacity proactively without manual intervention.

Scheduled Scaling for Auto Scaling

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asked 16/09/2024
Andrew Vogel
40 questions
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