A company has a development database running on Amazon Aurora MySQL. The database is only used by developers during business hours (9 AM to 5 PM, Monday to Friday). Outside of these hours, the database sits completely idle. What is the MOST cost-effective architectural choice for this database?

Answer options:

Purchase a Reserved Instance for the database.

Use Amazon Aurora Serverless.

Write a Lambda function to delete the database every night and restore from snapshot every morning.

Migrate the database to Amazon EC2 and use Auto Scaling.

How to approach this question

Look for 'intermittent usage' or 'sits completely idle'. Aurora Serverless can scale to zero, saving compute costs.

Full Answer

B.Use Amazon Aurora Serverless.✓ Correct

Amazon Aurora Serverless is an on-demand, auto-scaling configuration for Aurora. It automatically starts up, shuts down, and scales capacity up or down based on your application's needs.

Common mistakes

Choosing RIs for intermittent workloads.

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