Overview

This document describes how to upgrade a TencentDB for MySQL instance from two-node to three-node in the console.

Note：

• Only TencentDB for MySQL two-node instances can be upgraded to three-node.
• The upgrade will not interrupt the instance service.
• You can also purchase three-node instances on the purchase page.

Directions

1. Log in to the TencentDB for MySQL console. In the instance list, click an instance ID or Manage in the Operation column to enter the instance details page.
2. In the Configuration Info section, click Upgrade to Three-node next to Architecture.
   
3. In the pop-up dialog box, specify the data replication mode and availability zones and click OK.
   • Data Replication Mode: for more information, please see Database Instance Replication.
   • Multi-AZ Deployment: multi-AZ deployment protects database service from being interrupted in case of database failures or availability zone failures.
     • For a three-node instance, its replicas can be deployed in the source availability zone or different availability zones. We recommend you deploy one replica in the source availability zone and another replica in a different availability zone.
     • Currently, only some source availability zones support selecting different availability zones as replica availability zones. You can view these source availability zones and the supported replica availability zones on the purchase page.
       
4. After the payment is completed, you will be redirected to the instance list. After the status of the instance changes from Changing configuration to Running, it can be used normally.

FAQs

How do I view the architecture information of an instance?

Log in to the TencentDB for MySQL console. In the instance list, view the architecture information in the Configuration column; or click an instance ID or Manage in the Operation column to enter the instance details page, where you can view the architecture information in the Configuration Info > Architecture section.

How do I view the source and replica availability zones of an instance?

Log in to the TencentDB for MySQL console. In the instance list, click an instance ID or Manage in the Operation column to enter the instance details page, where you can view the source and replica availability zones in the Availability Info section.