tencent cloud

TDSQL-C for MySQL

Overview of Multi-AZ Deployment

Download
Focus Mode
Font Size
Last updated: 2026-05-21 15:52:09
TDSQL-C for MySQL clusters, whether in the pre-configured resources or Serverless instance mode, support Multi-AZ deployment. Compared to the single-AZ deployment mode, Multi-AZ deployment offers higher disaster recovery capabilities. It protects your database against instance failures or AZ outages, enabling resilience against data center-level failures. Multi-AZ deployment provides high availability and failover support for database instances. A multi-AZ is a physical area formed by combining multiple single AZs within the same region at the single-AZ level. This document describes Multi-AZ deployment for clusters in the Serverless instance mode. To learn about Multi-AZ deployment for clusters in the pre-configured resources instance mode, see Multi-AZ Deployment Overview.

Prerequisites

The region where the cluster is located must contain two or more AZs.
The target AZ has sufficient compute resources.
Database version requirements:
Database version 5.7 must meet the requirement that the kernel minor version is not lower than 2.0.15.
Database version 8.0 must meet the requirement that the kernel minor version is not lower than 3.0.1.

Supported Regions and AZs

Currently, this feature is in open beta and is only supported in the regions and AZs listed in the table below.
This feature will be gradually expanded to support more regions and AZs.
If it is required by your business, you can submit a ticket to request deployment in other regions and AZs.
Supported Region
Supported Primary AZ
Supported Secondary AZ
Beijing
Beijing Zone 3
Beijing Zone 5
Beijing Zone 5
Beijing Zone 7
Beijing Zone 6
Beijing Zone 7
Beijing Zone 8
Beijing Zone 7
Beijing Zone 5
Shanghai
Shanghai Zone 2
Shanghai Zone 4
Shanghai Zone 4
Shanghai Zone 2
Shanghai Zone 5
Shanghai Zone 4
Guangzhou
Guangzhou Zone 3
Guangzhou Zone 4
Guangzhou Zone 4
Guangzhou Zone 6
Guangzhou Zone 6
Guangzhou Zone 4
Guangzhou Zone 7
Guangzhou Zone 7
Guangzhou Zone 4
Hong Kong (China)
Hong Kong (China) Zone 2
Hong Kong (China) Zone 3
Nanjing
Nanjing Zone 1
Nanjing Zone 2
Singapore
Singapore Zone 2
Singapore Zone 4
Singapore Zone 3
Singapore Zone 4
Singapore Zone 4
Singapore Zone 3
Silicon Valley
Silicon Valley Zone 2
Silicon Valley Zone 1
Virginia
Virginia Zone 1
Virginia Zone 2
Virginia Zone 2
Virginia Zone 1
Tokyo
Tokyo Zone 1
Tokyo Zone 2
Tokyo Zone 2
Tokyo Zone 1
Jakarta
Jakarta Zone 2
Jakarta Zone 1
Chengdu
Chengdu Zone 1
Multi-AZ deployment is not supported.
Seoul
Seoul Zone 2
Multi-AZ deployment is not supported.
Frankfurt
Frankfurt Zone 2
Frankfurt Zone 1
São Paulo
Sao Paulo Zone 1
Multi-AZ deployment is not supported.
Bangkok
Bangkok Zone 2
Bangkok Zone 1

Multi-AZ Deployment Pricing

No additional fees are required for the Multi-AZ deployment feature at this time.

Help and Support

Was this page helpful?

Help us improve! Rate your documentation experience in 5 mins.

Feedback