Creating a GD
Last updated:2025-07-25 15:50:49
This document introduces the operations and instructions for creating a global database (GD) through the console.
Note:
The GD feature is currently in the beta testing phase. If you want to experience it, submit a ticket for application.
Prerequisites
A cluster is created as the primary cluster for the GD. During the creation process, the database proxy should be enabled for the primary cluster, and the specifications of the read-write instance should be 4 cores or higher.
Precautions
The database proxy is enabled by default when a secondary cluster is created.
When the GD feature is enabled, the database proxy for both the primary cluster and secondary cluster in the GD cannot be disabled.
Introduction of Supported Modes and Versions
Supported instance mode: provisioned resource. Serverless clusters are not supported currently.
Supported versions: including kernel minor version TDSQL-C for MySQL 8.0 3.1.16.100 and later versions. To upgrade to this version, submit a ticket to obtain solutions. For details about upgrading the kernel minor version, see Upgrading the Kernel Minor Version.
Billing Instructions for Features
Currently, the cross-region traffic transmission for the GD feature is free of charge. You only need to pay for the fees associated with each cluster. For details on cluster pricing, see Product Pricing.
Introduction of Feature Limitations
Currently, this feature only supports the TDSQL-C for MySQL 8.0 version.
A GD contains a primary cluster and up to 2 secondary clusters.
The primary cluster and secondary cluster share a set of global parameters.
To enable the GD feature, the specification of the read-write instance is required to be 4 cores or higher.
Neither the primary cluster nor the secondary cluster in the GD supports the Serverless configuration feature or the operation to convert instances to Serverless mode.
Supported Regions and AZs
Creating a GD
1. Log in to the TDSQL-C for MySQL console.
2. Click GDN in the left sidebar.
3. Click Create GD on the interface.
4. In the pop-up window, complete the following configurations, and click OK.
Parameter | Description |
Name | Name of the GD, which should be configured with business significance (subsequent modification is supported) for easy identification. Input format: Start with uppercase and lowercase letters or Chinese characters, consisting of digits, underscores (_), or hyphens (-), with a length of 2 to 126 characters. |
Primary Region | Select the region where the primary cluster is located. Note: First, confirm which cluster you want to select as the primary cluster and then select the region where the cluster is located. |
Source AZ | Select the primary AZ in the region where the primary cluster is located. |
Primary Cluster | Select an existing cluster as the primary cluster for the GD. Note: The database proxy should be enabled for the primary cluster, and the specification of the read-write instance should be 4 cores or higher. |
5. (Optional) After successful creation of the GD, you can add a secondary cluster. For directions, see Managing Secondary Clusters.
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