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Overview

Last updated: 2024-09-09 16:21:25
    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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