SAP-C02 Question 84
Select 2A company runs a critical e-commerce platform on AWS. The platform uses an RDS database for transactional data and an EC2 Auto Scaling group for application servers. After a recent outage, the company decided to define specific RTO and RPO requirements. The CTO has outlined the following goals: the platform should recover within 15 minutes of an outage (RTO), and no more than 5 minutes of data loss is acceptable (RPO). Which combination of strategies should the Solutions Architect implement to meet these requirements?
- A
Enable Multi-AZ deployment for the RDS database.
- B
Configure RDS automated backups with a 5-minute backup frequency.
- C
Use an Auto Scaling group with a minimum instance count greater than zero for the EC2 application servers.
- D
Enable RDS Read Replicas in another region for disaster recovery.
- E
Implement Amazon Aurora Global Database for cross-region resilience.
Show answer and explanation
Correct answers: A, C
Explanation
To meet an RTO of 15 minutes and an RPO of 5 minutes, the company needs high availability and minimal data loss. Multi-AZ RDS ensures automated failover and data replication to meet the RTO, while maintaining application servers with an Auto Scaling group ensures quick recovery in case of failures. Other options like RDS Read Replicas and Aurora Global Database provide additional resilience but are not strictly required for the given RTO and RPO requirements.
- A. Correct.
Enabling Multi-AZ deployment for RDS ensures high availability and automated failover. It helps meet the RTO of 15 minutes by providing a standby instance that can take over in case of a failure.
- B. Incorrect.
RDS automated backups are not configurable to run every 5 minutes. Automated backups occur daily, and transaction logs are used for point-in-time recovery, but this does not meet the 5-minute RPO requirement.
- C. Correct.
Using an Auto Scaling group with a minimum instance count greater than zero ensures that there are always application servers running, which helps meet the RTO of 15 minutes by avoiding outages due to a lack of instances.
- D. Incorrect.
RDS Read Replicas are designed for read scalability and not for high availability or disaster recovery. They do not support automatic failover, so they do not directly help meet the RTO or RPO requirements.
- E. Incorrect.
Amazon Aurora Global Database offers cross-region replication with very low latency. While this improves resilience, it is not necessary to meet the stated RTO and RPO requirements for this scenario, as Multi-AZ RDS already addresses these needs.