Multi-AZ DB clusters - Amazon Relational Database Service
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Multi-AZ DB clusters

A Multi-AZ DB cluster deployment in Amazon RDS provides a high availability deployment mode of Amazon RDS with two readable standby DB instances. A Multi-AZ DB cluster has a writer DB instance and two reader DB instances in three separate Availability Zones in the same Region. Multi-AZ DB clusters provide high availability, increased capacity for read workloads, and lower write latency when compared to Multi-AZ DB instance deployments. For more information, see Multi-AZ DB cluster deployments.

Multi-AZ DB clusters aren't available with the following engines:

  • RDS for MariaDB

  • RDS for Oracle

  • RDS for SQL Server

Multi-AZ DB clusters with RDS for MySQL

Following are the supported engines and Region availability for Multi-AZ DB clusters with RDS for MySQL.

Region RDS for MySQL 8.0
US East (Ohio) Version 8.0.28 and higher
US East (N. Virginia) Version 8.0.28 and higher
US West (N. California)
US West (Oregon) Version 8.0.28 and higher
Africa (Cape Town) Version 8.0.28 and higher
Asia Pacific (Hong Kong) Version 8.0.28 and higher
Asia Pacific (Hyderabad)
Asia Pacific (Jakarta) Version 8.0.28 and higher
Asia Pacific (Melbourne)
Asia Pacific (Mumbai) Version 8.0.28 and higher
Asia Pacific (Osaka) Version 8.0.28 and higher
Asia Pacific (Seoul) Version 8.0.28 and higher
Asia Pacific (Singapore) Version 8.0.28 and higher
Asia Pacific (Sydney) Version 8.0.28 and higher
Asia Pacific (Tokyo) Version 8.0.28 and higher
Canada (Central) Version 8.0.28 and higher
China (Beijing)
China (Ningxia)
Europe (Frankfurt) Version 8.0.28 and higher
Europe (Ireland) Version 8.0.28 and higher
Europe (London) Version 8.0.28 and higher
Europe (Milan) Version 8.0.28 and higher
Europe (Paris) Version 8.0.28 and higher
Europe (Spain)
Europe (Stockholm) Version 8.0.28 and higher
Europe (Zurich)
Middle East (Bahrain) Version 8.0.28 and higher
Middle East (UAE)
South America (São Paulo) Version 8.0.28 and higher
Amazon GovCloud (US-East)
Amazon GovCloud (US-West)

You can also list the supported versions in a Region for the db.r5d.large DB instance class by running the following Amazon CLI command.

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options \ --engine mysql \ --db-instance-class db.r5d.large \ --query '*[]|[?SupportsClusters == `true`].[EngineVersion]' \ --output text

For Windows:

aws rds describe-orderable-db-instance-options ^ --engine mysql ^ --db-instance-class db.r5d.large ^ --query "*[]|[?SupportsClusters == `true`].[EngineVersion]" ^ --output text

You can change the DB instance class to show the supported engine versions for it.

Multi-AZ DB clusters with RDS for PostgreSQL

Following are the supported engine version and Region availability for Multi-AZ DB clusters with RDS for PostgreSQL.

Region RDS for PostgreSQL 14 RDS for PostgreSQL 13
US East (Ohio) Version 14.5 and higher Version 13.4 and version 13.7 and higher
US East (N. Virginia) Version 14.5 and higher Version 13.4 and version 13.7 and higher
US West (N. California)
US West (Oregon) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Africa (Cape Town) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Hong Kong) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Hyderabad)
Asia Pacific (Jakarta) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Melbourne)
Asia Pacific (Mumbai) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Osaka) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Seoul) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Singapore) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Sydney) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Asia Pacific (Tokyo) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Canada (Central) Version 14.5 and higher Version 13.4 and version 13.7 and higher
China (Beijing)
China (Ningxia)
Europe (Frankfurt) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (Ireland) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (London) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (Milan) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (Paris) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (Spain)
Europe (Stockholm) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Europe (Zurich)
Middle East (Bahrain) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Middle East (UAE)
South America (São Paulo) Version 14.5 and higher Version 13.4 and version 13.7 and higher
Amazon GovCloud (US-East)
Amazon GovCloud (US-West)

You can also list the supported versions in a Region for the db.r5d.large DB instance class by running the following Amazon CLI command.

For Linux, macOS, or Unix:

aws rds describe-orderable-db-instance-options \ --engine postgres \ --db-instance-class db.r5d.large \ --query '*[]|[?SupportsClusters == `true`].[EngineVersion]' \ --output text

For Windows:

aws rds describe-orderable-db-instance-options ^ --engine postgres ^ --db-instance-class db.r5d.large ^ --query "*[]|[?SupportsClusters == `true`].[EngineVersion]" ^ --output text

You can change the DB instance class to show the supported engine versions for it.