Chapter 14

1. 1 and 3

Changing the times the backups run to outside peak hours is a good solution.

Increasing the instance class may help but it will not be cost-effective.

Using a read replica for backups will reduce the load on the primary node and is a good solution.

Increasing the number of shards will not help.

Increasing the storage will not help.

Changing to provisioned IOPS will not help.

2. 1

Creating an AWS Backup policy for 90 days and applying it to all RDS instances is the simplest solution.

Modifying each RDS instance with 90-day backup retention will work but it is not the best solution, as new instances may get missed and it is a manual effort.

Using Lambda is a very complicated solution.

There is no such feature on RDS to push backups to Glacier.

3. 2

A read replica in a secondary region is a very expensive solution.

AWS Backups can store backups to another region, so this is the best solution.

Manually...