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TDSQL-C for MySQL

Multi-AZ Deployment

Last updated: 2024-04-25 09:44:59
TDSQL-C for MySQL offers both preset resources and Serverless cluster types, all supporting multi-availability zone deployment. Compared to single availability zone deployment, multi-availability zone deployment offers higher disaster recovery capabilities, ensuring database protection against instance failures or availability zone interrupts, and providing resilience against data center level failures. Multi-availability zone deployment enhances database instances with high availability and failover support. A multi-availability zone configuration involves combining multiple single availability zones within the same region into a physical zone. This article introduces multi-availability zone deployment for Serverless clusters. For information on multi-availability zone deployment with preset resources, please see Overview of Multi-availability zone Deployment.

Prerequisites

The cluster region has at least two AZs.
The target AZ has sufficient computing resources.
Database version requirements:
Database version 5.7 with kernel minor version 2.0.15 or later.
Database version 8.0 with kernel minor version 3.0.1 or later.

Supported Regions and AZs

Currently, this feature is in beta test and only supports the following regions and AZs.
This feature will gradually support more regions and AZs.
If your business requires it, you can Submit a Ticket to request deployment in other Regions and AZs.
Supported Regions
Supports primary availability zone
Supports standby availability zone
Beijing
Beijing Zone 3
Beijing Zone 5
Beijing Zone 6
Beijing Zone 7
Beijing Zone 7
Beijing Zone 5
Shanghai
Shanghai Zone 2
Shanghai Zone 4
Shanghai Zone 4
Shanghai Zone 2
Hong Kong (China)
Hong Kong (China) Zone 2
Hong Kong Zone 3

Multi-AZ Deployment Fee Description

There are no additional fees for the Multi-AZ Deployment feature for the time being.

Multi-AZ Deployment Feature Operations

The operations for Serverless cluster and those pre-configured for Multi-AZ Deployment are consistent. You can refer to the table below.
Functional Item
Directions
Set multi-AZ deployment.
Supports setting Multi-AZ deployment during and after cluster creation via the Console. For operations, see Setting Multi-AZ Deployment.
Switching AZs
Supports the primary-standby switch for clusters with Multi-AZ Deployment. For operations, see Switch Availability Zone.
Modifying AZ deployment
Supports upgrading from Single AZ to Multi-AZ, as well as downgrading from Multi-AZ to Single AZ. For operations, see Modify AZ Deployment.
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