Which solution meets these requirements with the LEAST amount of effort?
Enable storage autoscaling in RDS
Increase the RDS database instance size
Change the RDS database instance storage type to Provisioned IOPS
Back up the RDS database, increase the storage capacity, restore the database, and stop the previous instance
Explanations:
Enabling storage autoscaling allows Amazon RDS to automatically increase the storage capacity when it reaches the defined threshold, with no downtime or manual intervention required.
Increasing the RDS database instance size adjusts the instance’s CPU and memory, but does not increase disk space. Disk space expansion requires a different approach.
Changing the storage type to Provisioned IOPS affects performance, not disk space. This option would not address the issue of running out of storage space.
This option involves manual intervention, downtime for backup/restore, and extra complexity. It is more disruptive and requires more effort than enabling autoscaling.
I reckon the answer is:
Enable storage autoscaling in RDS