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TDSQL-C for MySQL
DocumentationTDSQL-C for MySQLOperation GuideMulti-AZ DeploymentOverview
Overview
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Last updated: 2024-09-09 16:21:25
Overview
Last updated: 2024-09-09 16:21:25
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TDSQL-C for MySQL clusters come in either pre-configured resources or Serverless forms, both supporting multi-AZ deployments. Compared to single-AZ deployment, multi-AZ deployment offers higher disaster recovery capabilities to protect the database against instance failures or AZ interruptions, capable of withstanding data center-level failures. Multi-AZ deployment provides database instances with High Availability and failover support. A multi-AZ structure combines several single-AZs within the same region into a physical zone at a level above single-AZ. This article introduces multi-AZ deployment for clusters with pre-configured resources. For details on multi-AZ deployment for Serverless instance types, see Multi-AZ 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 above.
Database version 8.0 with kernel minor version 3.0.1 or above.

Multi-AZ Deployment Architecture



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 required by your business, you can submit a ticket to apply for deployment in other regions and AZs.
Supported Regions
Supports primary availability zone
Supports secondary availability zone
Beijing
Beijing Zone 3
Beijing Zone 5
Beijing Zone 5
Beijing Zone 7
Beijing Zone 6
Beijing Zone 7
Beijing Zone 7
Beijing Zone 5
Guangzhou
Guangzhou Zone 3
Guangzhou Zone 4
Guangzhou Zone 4
Guangzhou Zone 6
Guangzhou Zone 6
Guangzhou Zone 4
Shanghai
Shanghai Zone 2
Shanghai Zone 4
Shanghai Zone 4
Shanghai Zone 2
Shanghai Zone 5
Shanghai Zone 4
Hong Kong (China)
Hong Kong (China) Zone 2
Hong Kong Zone 3
Singapore
Singapore Zone 2
Singapore Zone 4
Singapore Zone 3
Singapore Zone 4
Silicon Valley
Silicon Valley Zone 2
Silicon Valley Zone 1
Frankfurt
Frankfurt Zone 1
Frankfurt Zone 2
Frankfurt Zone 2
Frankfurt Zone 1
Virginia
Virginia Zone 1
Virginia Zone 2
Virginia Zone 2
Virginia Zone 1
Tokyo
Tokyo Zone 2
Tokyo Zone 1

How to Implement Multi-AZ Architecture

Regarding the multi-AZ architecture, it can be achieved by creating a new cluster via the console. Existing single-AZ clusters will also be upgraded to multi-AZ clusters. This upgrade is automatically completed through online data migration, with no impact on your business. For more details, see Setting Multi-AZ Deployment.

Multi-AZ Billing Description

There are no additional fees for the multi-AZ feature for the time being.
Note:
Currently, single-AZ clusters can also be upgraded to multi-AZ clusters for free.

Multi-AZ Information Display

On the cluster list page, display according to the view mode actually used:
Tab View
List view
1. Click the cluster in the left side of the Cluster List page to enter the cluster management page.
2. On the cluster management page, under Deployment Mode, and in the Architecture section of the cluster details, you can see the deployment mode and primary and secondary availability zones of the cluster.

1. The Cluster List page displays the information of the cluster's primary AZ.

2. On the cluster details page, you can view the availability zones where the cluster deployment is distributed in Basic Info and Availability Info sections.



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