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AWS Certified Solutions Architect - Associate · AWS
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Lambda needs to be in the same network comunication to aurora, you can do this using RDS Proxy.
Ans D: This is the best solution. By using an SQS FIFO queue, you can store customer data reliably even when the database is temporarily unavailable. The Lambda function can immediately write the data to the queue when the database is not available. A second Lambda function can then poll the queue and process the customer data when the database becomes available again. This ensures that no data is lost, and processing happens in an orderly manner.
Scenario describes 1 DB and when it's unavailable due to an upgrade. Best solution is to queue incoming data until DB is available.