A 311 service database must stay highly available inside a single Region with automated failover if the primary instance fails. Which data-store pattern best meets that HA requirement?
Select an answer to reveal the explanation.
Short Explanation
Multi-AZ Aurora is the 311 desk that keeps a backup clerk warm in another building in the same city—if the primary desk fails, calls still get answered without waiting for another Region.
Full Explanation
Multi-AZ Aurora (or Multi-AZ RDS) provides synchronous standby capacity and automated failover suitable for in-Region HA requirements such as a 311 database. Single-AZ without backups, instance-store-only designs, and unnecessary always-on multi-Region meshes (when only in-Region HA is required) either under-deliver availability or overspend relative to the stated need.