A regional water authority considers an Aurora or RDS cross-Region read replica for a second office. When is that replica the cost-aware choice?
Select an answer to reveal the explanation.
Short Explanation
A spare pipe across the state is great when the town needs water there—not when it just looks fancy on a diagram. Buy the cross-Region replica when locality or DR value beats the bill.
Full Explanation
Cross-Region read replicas incur replication transfer, storage, and instance costs. They are justified when remote read locality or DR objectives provide measured benefit above that spend. They are not free, do not replace deleting the primary, and should not be added merely because one query is slow locally.