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Multi-AZ Database Instance Deployment In AWS

In this article, we will discuss multi-AZ database instance deployment.

Purpose

Multi-AZ database instance deployment creates another standby database in different AZ. The purpose is to provide failover support.

How Is The Database Synchronized In Multi-AZ Instance Deployment?

If we modify the existing database and enable multi-AZ instance deployment then: -

RDS takes the snapshot of the primary database
RDS restores the snapshot in another AZ

For synchronization, RDS setup the synchronous replication between the primary and standby database instance.

How To Enable Multi-AZ Database Instance Deployment?

If you are creating a new database or modifying the existing database then you can check the checkbox "Create a standby instance (recommended for production usage)" in the "Availability & durability" section.

Picture showing enabling the option for creating the multi AZ DB

Click to Enlarge

Once the option is saved, the value of the "Multi-AZ" flag is "Yes".

Picture showing the value of Multi-AZ column as Yes

Click to Enlarge

Posted By -	Karan Gupta

Posted On -	Friday, January 14, 2022

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