Questions on Multi-AZ RDS

[victor-mendonca]

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 6 years, 2 months ago by  victor-mendonca. Reason: Bullet points

[Jon-Bonso]

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]

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]

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