An organization is setting up a multi-site solution where the application runs on premise as well
as on AWS to achieve the minimum recovery time objective(RTO). Which of the below mentioned
configurations will not meet the requirements of the multi-site solution scenario?

A.
Configure data replication based on RTO.

B.
Keep an application running on premise as well as in AWS with full capacity.

C.
Setup a single DB instance which will be accessed by both sites.

D.
Setup a weighted DNS service like Route 53 to route traffic across sites.

Explanation:
AWS has many solutions for DR(Disaster recovery) and HA(High Availability). When the
organization wants to have HA and DR with multi-site solution, it should setup two sites: one on
premise and the other on AWS with full capacity. The organization should setup a weighted DNS
service which can route traffic to both sites based on the weightage. When one of the sites fails it
can route the entire load to another site. The organization would have minimal RTO in this
scenario. If the organization setups a single DB instance, it will not work well in failover.
Instead they should have two separate DBs in each site and setup data replication based on
RTO(recovery time objective )of the organization.
http://d36cz9buwru1tt.cloudfront.net/AWS_Disaster_Recovery.pdf