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  • Clarification on RDS high-availability question

  • samuel-rodriguez-perez

    Member
    December 14, 2020 at 1:19 am

    Please help me to understand the right answer for the following question:

    “A leading financial firm recently adopts a hybrid cloud architecture using AWS to take advantage of its various services, which can provide high availability and scalability to their application. You are tasked to migrate the web application and database from their on-premises data center to the newly launched VPC and ensure that it is scalable and highly available.”

    Why “Migrate the local database to an RDS instance with Read Replicas deployed on a separate AWS Region.” answer is incorrect?

    Wouldn’t it be a better answer than “Migrate the local database to an RDS Multi-AZ deployments configuration with Read Replicas.”?

  • Gerome-TutorialsDojo

    Member
    December 14, 2020 at 8:12 pm

    Hello samuel,

    Thanks for the feedback.

    Based on the requirements in the question, you need to ensure the database must be scalable and highly available. If you would only use Read Replicas, this won’t satisfy the requirement “high availability”.

    The option “Migrate the local database to an RDS Multi-AZ deployments configuration with Read Replicas” is the most suitable answer in the scenario because it is highly available (Multi-AZ) and can serve high volume read traffic (Read Replica – scalable).

    Amazon RDS Multi-AZ deployments provide enhanced availability and durability for database instances, making them a natural fit for production database workloads.

    Read Replicas make it easy to elastically scale out beyond the capacity constraints of a single DB instance for read-heavy database workloads.

    https://aws.amazon.com/rds/features/

    Let us know if you need further assistance. The Tutorials Dojo team is dedicated to helping you pass your AWS exam on your first try!

    Regards,

    Gerome @ Tutorials Dojo

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