High Availability (Multi-AZ)
Download
Focus Mode
Font Size
Multi-AZ deployment protects your databases against instance failures or AZ outages. For information about regions and supported AZs, see Regions and AZs.
TencentDB for MySQL multi-AZ deployment provides high availability and failover support for database instances. A multi-AZ is a physical area formed by combining multiple single AZs within the same region at the single-AZ level.
Note:
Two-Node, Three-Node, and Four-Node instances:
Regardless of whether the instances in a database cluster span multiple AZs, the high availability of each TencentDB for MySQL instance is ensured by its real-time hot standby secondary server.
In a multi-AZ deployment, TencentDB for MySQL automatically provisions and maintains a synchronous standby replica across different AZs.
The primary database instance is synchronously replicated to the standby replica across AZs to provide data redundancy, eliminate I/O freezes, and minimize latency spikes during system backups.
Cloud disk-based instances:
Replica nodes support read-only access. A cloud disk-based instance can contain only one primary node (read-write node) and up to five replica nodes (read-only nodes).
All read-only nodes in a cloud disk-based instance support AZ configuration, which must be in the same region as the read-write node.
Supported Region
Multi-AZ deployment for TencentDB for MySQL is currently available in the following regions: Guangzhou, Shenzhen Finance, Shanghai, Shanghai Finance, Nanjing, Beijing, Chengdu, Hong Kong (China), Singapore, Jakarta, Bangkok, Seoul, Tokyo, Silicon Valley, Virginia, Frankfurt, and Riyadh.
Multi-AZ Deployment
1. Log in to the TencentDB for MySQL console. In the instance list, click Create to go to the purchase page.
2. On the MySQL purchase page, select a supported region and choose either the two-node, three-node or four-node architecture. Then, select a corresponding secondary AZ in the Replica AZ option.
Note:
Only some AZs can be used as replica AZs. You can view available replica AZs on the purchase page.
3. After confirming the information, click Buy Now. Once the payment is completed, you can return to the instance list to view the purchased multi-AZ instance.
1. Log in to the TencentDB for MySQL console. In the instance list, click Create to go to the purchase page.
2. On the MySQL purchase page, select a supported region and choose the cluster edition architecture. You can then select the Availability Zone for Read-Write Nodes and the Availability Zone for Read-Only Nodes.
3. After confirming the information, click Buy Now. Once the payment is completed, you can return to the instance list to view the purchased multi-AZ instance.
Failover
TencentDB for MySQL automatically handles failover, enabling you to quickly resume database operations without administrative intervention. If any of the following conditions occur, the primary database instance is automatically switched to the standby replica in the secondary AZ:
An AZ is interrupted.
The primary database instance fails.
Help and Support
Was this page helpful?
You can also Contact sales or Submit a Ticket for help.
Help us improve! Rate your documentation experience in 5 mins.
Feedback