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A team wants to reduce Amazon RDS costs by stopping the database outside business hours. Which option is the MOST cost-effective and operationally clean?
ASchedule stop/start of the RDS instance using EventBridge + Lambda (or AWS Instance Scheduler) — RDS stops billing for instance hours when stopped (storage continues)
BMigrate to AWS Snowball Edge after hours
CDelete the database permanently every Friday evening
DDrop and recreate the database every weekday morning
Answer & Solution
Correct answer: A. Schedule stop/start of the RDS instance using EventBridge + Lambda (or AWS Instance Scheduler) — RDS stops billing for instance hours when stopped (storage continues)
RDS instances can be stopped for up to 7 days — compute charges pause, storage charges continue. EventBridge + Lambda or the Instance Scheduler solution automate this. The destructive options destroy data; Snowball is offline transfer.
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