Upgrading Two-Node Instances to Three-Node Instances

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Upgrading Two-Node Instances to Three-Node Instances

Last updated: 2024-07-22 14:39:43

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.
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3. In the pop-up dialog box, specify the data replication mode and availability zones and click Submit.
Data Replication Mode: For more information, 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 AZ or different AZ. We recommend that you deploy one replica in the source AZ and another replica in a different AZ.
Currently, only some source AZs support selecting different AZs as replica AZs. You can view these source AZs and the supported replica AZs on the purchase page.
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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.
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How do I view the source and replica AZs 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 AZs in the Availability Info section.
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