A 911 CAD reporting database must survive an Availability Zone outage with automatic failover and minimal operator heroics. Which database HA design should the city choose?
Select an answer to reveal the explanation.
Short Explanation
911 reporting can’t wait for someone to rebuild a disk from a snapshot after an AZ blinks. Multi-AZ RDS keeps a standby ready and fails over for you.
Full Explanation
Multi-AZ deployments of Amazon RDS or Aurora maintain a synchronous standby in another AZ and perform automatic failover, preserving availability for critical workloads such as CAD reporting. Snapshot-only single-AZ designs, lone EC2 databases, and misstated DynamoDB AZ limits do not provide that managed AZ-level HA.