Which of the following AWS services can fulfill this requirement?

A Solutions Architect needs to set up a relational database and come up with a disaster recovery plan to mitigate multi-region failure. The solution requires a Recovery Point Objective (RPO) of 1 second and a Recovery Time Objective (RTO) of less than 1 minute.

Which of the following AWS services can fulfill this requirement?
A . Amazon Timestream
B . Amazon Aurora Global Database
C . Amazon RDS for PostgreSQL with cross-region read replicas
D . Amazon Quantum Ledger Database (Amazon QLDB)

View Answer

Answer: B

Explanation:

Amazon Aurora Global Database is designed for globally distributed applications, allowing a single Amazon Aurora database to span multiple AWS regions. It replicates your data with no impact on database performance, enables fast local reads with low latency in each region, and provides disaster recovery from region-wide outages.

Aurora Global Database supports storage-based replication that has a latency of less than 1 second. If there is an unplanned outage, one of the secondary regions you assigned can be promoted to read and

write capabilities in less than 1 minute. This feature is called Cross-Region Disaster Recovery. An RPO of 1 second and an RTO of less than 1 minute provide you a strong foundation for a global business continuity plan.

Hence, the correct answer is: Amazon Aurora Global Database.

Amazon Quantum Ledger Database (Amazon QLDB) is incorrect because it is stated in the scenario that the Solutions Architect needs to create a relational database and not a ledger database. An Amazon Quantum Ledger Database (QLDB) is a fully managed ledger database that provides a transparent, immutable, and cryptographically verifiable transaction log. Moreover, QLDB cannot provide an RPO of 1 second and an RTO of less than 1 minute.

Multi-AZ Amazon RDS database with cross-region read replicas is incorrect because a Multi-AZ deployment is only applicable inside a single region and not in a multi-region setup. This database setup is not capable of providing an RPO of 1 second and an RTO of less than 1 minute. Moreover, the cross-region RDS Read Replica replication is not as fast as Amazon Aurora Global Databases.

Amazon Timestream is incorrect because this is a serverless time series database service that is commonly used for IoT and operational applications. The most suitable solution for this scenario is to use the Amazon Aurora Global Database since it can provide the required RPO and RTO. References:

https://aws.amazon.com/rds/aurora/global-database/

https://docs.aws.amazon.com/AmazonRDS/latest/AuroraUserGuide/aurora-global-database.html

Amazon Aurora Overview:

https://youtu.be/iwS1h7rLNBQ

Check out this Amazon Aurora Cheat Sheet:

https://tutorialsdojo.com/amazon-aurora/