# Supported Regions and DB engines for Multi-AZ DB clusters in Amazon RDS
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 for Amazon RDS](multi-az-db-clusters-concepts.md).
Multi-AZ DB clusters aren't available with the following engines:
+ RDS for Db2
+ RDS for MariaDB
+ RDS for Oracle
+ RDS for SQL Server
**Topics**
+ [Multi-AZ DB clusters with RDS for MySQL](#Concepts.RDS_Fea_Regions_DB-eng.Feature.MultiAZDBClusters.my)
+ [Multi-AZ DB clusters with RDS for PostgreSQL](#Concepts.RDS_Fea_Regions_DB-eng.Feature.MultiAZDBClusters.pg)
## Multi-AZ DB clusters with RDS for MySQL
The following Regions and engine versions are available for Multi-AZ DB clusters with RDS for MySQL.
| Region | RDS for MySQL 8.4 | RDS for MySQL 8.0 |
| --- | --- | --- |
| US East (N. Virginia) | All available versions | All available versions |
| US East (Ohio) | All available versions | All available versions |
| US West (N. California) | Not available | Not available |
| US West (Oregon) | All available versions | All available versions |
| Africa (Cape Town) | All available versions | All available versions |
| Asia Pacific (Hong Kong) | All available versions | All available versions |
| Asia Pacific (Hyderabad) | All available versions | All available versions |
| Asia Pacific (Jakarta) | All available versions | All available versions |
| Asia Pacific (Malaysia) | All available versions | All available versions |
| Asia Pacific (Melbourne) | All available versions | All available versions |
| Asia Pacific (Mumbai) | All available versions | All available versions |
| Asia Pacific (New Zealand) | Not available | Not available |
| Asia Pacific (Osaka) | All available versions | All available versions |
| Asia Pacific (Seoul) | All available versions | All available versions |
| Asia Pacific (Singapore) | All available versions | All available versions |
| Asia Pacific (Sydney) | All available versions | All available versions |
| Asia Pacific (Taipei) | Not available | Not available |
| Asia Pacific (Thailand) | Not available | Not available |
| Asia Pacific (Tokyo) | All available versions | All available versions |
| Canada (Central) | All available versions | All available versions |
| Canada (Central) | All available versions | All available versions |
| Canada West (Calgary) | All available versions | All available versions |
| China (Beijing) | All available versions | All available versions |
| China (Ningxia) | All available versions | All available versions |
| Europe (Frankfurt) | All available versions | All available versions |
| Europe (Ireland) | All available versions | All available versions |
| Europe (London) | All available versions | All available versions |
| Europe (Milan) | All available versions | All available versions |
| Europe (Paris) | All available versions | All available versions |
| Europe (Spain) | All available versions | All available versions |
| Europe (Stockholm) | All available versions | All available versions |
| Europe (Zurich) | All available versions | All available versions |
| Israel (Tel Aviv) | All available versions | All available versions |
| Mexico (Central) | All available versions | All available versions |
| Middle East (Bahrain) | All available versions | All available versions |
| Middle East (UAE) | All available versions | All available versions |
| South America (São Paulo) | All available versions | All available versions |
| AWS GovCloud (US-East) | Not available | Not available |
| AWS GovCloud (US-West) | Not available | Not available |
You can list the available versions in a Region for a given DB instance class using the AWS CLI. Change the DB instance class to show the available engine versions for it.
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
```
## Multi-AZ DB clusters with RDS for PostgreSQL
The following Regions and engine versions are available for Multi-AZ DB clusters with RDS for PostgreSQL.
| Region | RDS for PostgreSQL 18 | RDS for PostgreSQL 17 | RDS for PostgreSQL 16 | RDS for PostgreSQL 15 | RDS for PostgreSQL 14 | RDS for PostgreSQL 13 |
| --- | --- | --- | --- | --- | --- | --- |
| US East (N. Virginia) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| US East (Ohio) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| US West (N. California) | Not available | Not available | Not available | Not available | Not available | Not available |
| US West (Oregon) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Africa (Cape Town) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Hong Kong) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Hyderabad) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Jakarta) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Malaysia) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Melbourne) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Mumbai) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (New Zealand) | Not available | Not available | Not available | Not available | Not available | Not available |
| Asia Pacific (Osaka) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Seoul) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Singapore) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Sydney) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Asia Pacific (Taipei) | Not available | Not available | Not available | Not available | Not available | Not available |
| Asia Pacific (Thailand) | Not available | Not available | Not available | Not available | Not available | Not available |
| Asia Pacific (Tokyo) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Canada (Central) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Canada West (Calgary) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| China (Beijing) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| China (Ningxia) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Frankfurt) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Ireland) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (London) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Milan) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Paris) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Spain) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Stockholm) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Europe (Zurich) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Israel (Tel Aviv) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Mexico (Central) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Middle East (Bahrain) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| Middle East (UAE) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| South America (São Paulo) | All PostgreSQL 18 versions | All PostgreSQL 17 versions | All PostgreSQL 16 versions | All PostgreSQL 15 versions | Version 14.5 and higher | Version 13.4 and version 13.7 and higher |
| AWS GovCloud (US-East) | Not available | Not available | Not available | Not available | Not available | Not available |
| AWS GovCloud (US-West) | Not available | Not available | Not available | Not available | Not available | Not available |
You can list the available versions in a Region for a given DB instance class using the AWS CLI. Change the DB instance class to show the available engine versions for it.
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
```