AWS Certified Solutions Architect – Professional — Question 872

True or False: In Amazon ElastiCache replication groups of Redis, for performance tuning reasons, you can change the roles of the cache nodes within the replication group, with the primary and one of the replicas exchanging roles.

Answer options

• A. True, however, you get lower performance.
• B. FALSE
• C. TRUE
• D. False, you must recreate the replication group to improve performance tuning.

Correct answer: C

Explanation

In Amazon ElastiCache for Redis, you can manually initiate a failover to swap the roles of the primary node and one of the replicas for testing or performance tuning. This process is fully supported and does not require recreating the replication group, nor does it inherently result in degraded performance once the swap is complete.