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Home Forums AWS AWS Certified Solutions Architect Associate Questions on Multi-AZ RDS

  • Questions on Multi-AZ RDS

  • victor-mendonca

    Member
    May 22, 2020 at 9:16 am

    In regards to the following:

    An online events registration system is hosted in AWS and uses ECS to host its front-end tier and a Multi-AZ RDS for its database tier, which also has a standby replica. What are the events that will make Amazon RDS automatically perform a failover to the standby replica? (Select TWO.)

    It might be my interpretation, but my understanding of this question was that the setup had 3 databases:

    + Multi-AZ
    – Primary
    – Standby
    + Read Replica

    • This discussion was modified 4 years ago by  victor-mendonca. Reason: Bullet points
  • Jon-Bonso

    Administrator
    May 22, 2020 at 6:33 pm

    Hi Victor,

    In a Multi-AZ deployment, RDS automatically provisions and maintains a synchronous standby replica in a different AZ. The primary DB instance is synchronously replicated across AZs to a standby replica to provide data redundancy, eliminate I/O freezes, and minimize latency spikes during system backups.

    A “standby replica” is not the same with “Read Replica”. For more information, please read the following AWS documentation:

    https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html

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

    Regards,

    Jon Bonso @ Tutorials Dojo

  • victor-mendonca

    Member
    May 27, 2020 at 8:44 am

    Thanks for the reply Jon.

    I think for me it was just the sentence ‘and a Multi-AZ RDS for its database tier, which also has a standby replica‘ that confused me. I should have read it again. But it makes sense now.

    Cheers!

  • Jon-Bonso

    Administrator
    May 27, 2020 at 11:58 am

    No worries, Victor! The Tutorials Dojo team is always here to help!

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