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RDS modify Multi AZ to true

17 October,2023 by Rambler

How do I change my RDS from single AZ to multi AZ?


Step 1 : Make a note of the current configuration of the Single AZ RDS Instance 

aws rds describe-db-instances --db-instance-identifier myrdsinstance

"Address": "",

"AvailabilityZone": "az-1",

Multi AZ : false 


Step 2 : Modify the RDS Instance - in this case I'm applying immediately , although there is an option to make the change at the next Maintenance window 

aws rds modify-db-instance --db-instance-identifier myrdsinstance --multi-az --apply-immediately


aws rds describe-db-instances --db-instance-identifier dms-test-jv-instance

"DBInstanceStatus": "modifying"

Eventually it will change to to "available"


"Address": "",

"AvailabilityZone": "az-1",

Multi AZ : false 

"SecondaryAvailabilityZone": "az-2",

From AWS docs

"the new addition is SecondaryAvailabilityZone  .If MultiAZ is true , specifies the name of the secondary Availability Zone for a DB instance with multi-AZ support"


Read more on RDS management topics

What is option group and parameter group in RDS ?

How do I restore my AWS RDS? aws backup start-restore-job example

DeleteDBInstance - Cannot delete RDS Instance




Author: Rambler (


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