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Answer: Leverage Lambda and EventBridge for automated DB instance operation based on a schedule.
The correct option is D. Using AWS Lambda functions in conjunction with Amazon EventBridge (CloudWatch Events) to automatically start and stop the DB instance based on a schedule is a cost-effective solution. This approach ensures that the DB instance runs only during the required 12 hours daily, thereby minimizing costs associated with running the database instance for the entire day. Options A, B, and C involve either additional complexity or do not directly address the need to control DB instance costs effectively.
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How can a solutions architect minimize costs for a company using Amazon RDS for MySQL, with a web application accessed only 12 hours daily?
A
Implement IAM policy and roles for automated DB instance start/stop.
B
Deploy ElastiCache Redis to provide data access during DB instance downtime.
C
Utilize EC2 with a scheduled cron job for instance management.
D
Leverage Lambda and EventBridge for automated DB instance operation based on a schedule.