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Answer: Implement a rolling deployment policy with an additional batch, using a batch size of 1.
The most cost-effective way to solve the deployment issue is to implement a rolling deployment policy with an additional batch, using a batch size of 1. This ensures that a new instance with the updated application version is launched before terminating an old instance, maintaining at least four instances at all times and preventing performance degradation. Other options either result in additional costs or are insufficient to maintain the required minimum capacity.
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An AWS Elastic Beanstalk application is deployed with an Auto Scaling group configured for five EC2 instances. Deployments result in performance degradation if capacity falls below four instances. What is the most cost-effective deployment policy to maintain performance?
A
Increase the Auto Scaling group to six instances.
B
Adopt a traffic splitting deployment policy with a 1-hour evaluation period.
C
Implement a rolling deployment policy with an additional batch, using a batch size of 1.
D
Use a rolling deployment policy with a batch size of 2.
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