A customer runs an application in the US-West region in one of the availability zones and wants to set up the failover to another availability zone. The customer is also interested in implementing RDS Multi-AZ for high availability. However, you are worried that the synchronous replication between the primary DB and backup DB may impact the performance and the write and commit latency may increase. Which of the following actions can help you to address this concern?

Answer options:

A.Configure several RDS read-replicas in each availability zone.
B.Use Provisioned IOPS and DB instance classes that are optimized for Provisioned IOPS.
C.Configure a VPC peering connection between two availability zones for the RDS instances.
D.No actions are required as RDS Multi-AZ synchronous replication does not impact the performance.

Answer – B
Option A is incorrect because RDS read-replicas will not improve the performance for the write and commit latency. Read-replicas can help to share the read traffic.
Option B is CORRECT because this method can improve the RDS instances` performance with the Multi-AZ deployments.
Option C is incorrect because VPC peering connection can establish the communication between two different VPCs. But it does not improve the performance of the Multi-AZ DB instances.
Option D is incorrect. Please check the explanations of option
B.The reference can be found in https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html.