Question 860
For the enterprise requirement "A reporting dashboard overloads a relational database primary with read queries but still requires strongly controlled write ownership", the team implemented this change: Add supported RDS read replicas and route eventually consistent reporting reads away from the writer. Which result specifically demonstrates the fix works?
Explanation
Correct Answer
This measures the behavior required by the specific solution, rather than simply checking that it was configured. RDS read replicas scale read throughput but are asynchronous relative to the primary. The acceptance condition is linked directly to the scenario: A reporting dashboard overloads a relational database primary with read queries but still requires strongly controlled write ownership.
Incorrect Answers
Small traffic shares move to the new stack first; an error alarm redirects traffic to the proven stack. However, this does not establish the required outcome: writer CPU usage decreases while lag-tolerant reporting requests use replica endpoints.
Records are ingested within supported throughput limits without hot-shard throttling under replayed load. However, this does not establish the required outcome: writer CPU usage decreases while lag-tolerant reporting requests use replica endpoints.
Clients use accelerator anycast addresses and connect to the healthy regional endpoint with improved path latency. However, this does not establish the required outcome: writer CPU usage decreases while lag-tolerant reporting requests use replica endpoints.