AWS Certified Solutions Architect – Professional SAP-C01 – Question155

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.

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:

Explanation: In Amazon ElastiCache, a replication group is a collection of Redis Cache Clusters, with one primary read-write cluster and up to five secondary, read-only clusters, which are called read replicas. You can change the roles of the cache clusters within the replication group, with the primary cluster and one of the replicas exchanging roles. You might decide to do this for performance tuning reasons.
Reference:
http://docs.aws.amazon.com/AmazonElastiCache/latest/UserGuide/Repli…