I got this
(repeat later)
I need practice
(repeat soon)
Forget this
(repeat never)
Can you use read replicas to improve the availability of your RDS database?
  • You can reduce load on your primary database instance by creating read replicas and directing read queries to them. However, a read replica can not be promoted to primary database instance (except in the case of Aurora).
  • You can configure Multi-AZ setup for your RDS to increase availability. With Multi-AZ, a standby copy of your database is kept in sync, and promoted to primary database if needed.
  • According to AWS exam terminology, a read replica improves performance, not availability.