Overview
Last updated: 2025-11-20 10:15:32
TencentDB for MySQL supports four types of architectures: single-node (cloud disk edition), two-node (formerly high availability edition), and three-node (formerly finance edition),Cluster Edition (cloud disk edition).
Note:
The single-node (cloud disk edition) architecture is currently available in the regions of Shanghai, Beijing, Guangzhou, Chengdu, Hong Kong of China, Singapore, and Frankfurt. Other regions will be available gradually in the future.
The two-node (formerly high availability edition) employs a one-primary-one-replica mode. Only the primary database provides access services, and the replica database is dedicated for disaster recovery without providing access.
The three-node (formerly finance edition) employs a one-primary-two-replica mode. Only the primary database provides access services, and the two replica databases are dedicated for disaster recovery without providing access.
The Cluster Edition (cloud disk edition) employs a one-primary-multiple-replica mode. The primary node (read-write node) provides read-write services, and the replica nodes (read-only nodes) provide read-only access services.
Viewing the instance architecture
For instances to be purchased, enter the TencentDB for MySQL purchase page, and select the architecture in the Architecture section.
For purchased instances, log in to the TencentDB for MySQL console, find the target instance from the instance list, and view its architecture in the Configuration Info section.
Architecture comparison
Architecture | Single-Node | Two-Node | Three-Node | Cluster Edition | |
Basic | Economical | General Exclusive | General Exclusive | Standard Enhanced Flagship | |
Supported version | MySQL 5.6 MySQL 5.7 MySQL 8.0 | MySQL 5.7 MySQL 8.0 | MySQL 5.6 MySQL 5.7 MySQL 8.0 | MySQL 5.6 MySQL 5.7 MySQL 8.0 | MySQL 5.7 MySQL 8.0 |
Node | A single node | One primary node and one secondary node | One primary node and one secondary node | One primary node and two secondary nodes | One primary node and multiple secondary nodes Up to 5 read-only nodes |
Primary-secondary replication mode | - | Asynchronous Semi-synchronous (default) | Asynchronous Semi-synchronous (default) | Asynchronous Semi-synchronous (default) Strongly synchronous | Asynchronous Semi-synchronous (default) |
Instance availability | - | 99.95% | 99.95% | 99.99% | 99.95% |
Underlying storage | Enhanced SSD Premium Disk Cloud SSD | Local NVMe SSD | Local NVMe SSD | Local NVMe SSD | Tremendous SSD Enhanced SSD Premium Disk Cloud SSD |
IOPS performance | Enhanced SSD Benchmark performance: Random IOPS = min{1800 + Capacity (GiB) x 50, 50000} Cloud SSD Random IOPS = min{1800 + Capacity (GiB) x 30, 26000} Premium Disk Random IOPS = min{1800 + Capacity (GiB) x 8, 6000} | Up to 21000 | Up to 240000 | Up to 240000 | Tremendous SSD Benchmark performance: Random IOPS = min{4000 + Capacity (GiB) x 100, 50000} Enhanced SSD Benchmark performance: Random IOPS = min{1800 + Capacity (GiB) x 50, 50000} Premium Disk Random IOPS = min{1800 + Capacity (GiB) x 8, 6000} Cloud SSD Random IOPS = min{1800 + Capacity (GiB) x 30, 26000} |
Throughput performance (MB/s) | Enhanced SSD Benchmark performance: Throughput = min{120 + Capacity (GiB) x 0.5, 350} Cloud SSD Throughput = min{120 + Capacity (GiB) x 0.2, 260} Premium Disk Throughput = min{100 + Capacity (GiB) x 0.15, 150} | - | - | - | Tremendous SSD Benchmark performance: Throughput = min{120 + Capacity (GiB) x 0.5, 350} Enhanced SSD Benchmark performance: Throughput = min{120 + Capacity (GiB) x 0.5, 350} Premium Disk Throughput = min{100 + Capacity (GiB) x 0.15, 150} Cloud SSD Throughput = min{120 + Capacity (GiB) x 0.2, 260} |
Applicable scenario | Personal learning, micro-websites, enterprise non-core small systems, and large and medium-sized enterprise development and test environments | Small websites, Web applications, blogs, forums, and cloud development/test/learning environments | Gaming, Internet, IoT, retail e-commerce, logistics, insurance, and security industry applications | Gaming, Internet, IoT, retail e-commerce, logistics, insurance, and security industry applications | Gaming, Internet, IoT, retail e-commerce, logistics, insurance, and security industry applications |
References
TencentDB for MySQL supports MySQL 5.5, 5.6, 5.7, and 8.0. For more information, see Database Versions.
TencentDB for MySQL supports the following instance types: the source instance, the read-only instance, and the disaster recovery instance. For more information, see Database Instance Types.
TencentDB for MySQL supports different features in different architectures. For more information, see List of Feature Differences.
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