TencentDB for MySQL supports four types of architectures: the High-availability Edition, the Finance Edition, the Single-node High IO Edition, and the Basic Edition. This document describes the Single-node High IO Edition.

The Single-node High IO Edition adopts a single-physical node architecture with high cost performance.

Use Cases

Ideal for various industries with read/write separation requirements.

Features

The Single-node High IO Edition uses local NVMe SSD disks for underlying storage with excellent IO performance and is ideal for read-only instances to share business read load.

Basic Framework Diagram

Note：

• Single-node deployment is susceptible to single points of failure. If only one read-only instance is purchased, it is impossible to ensure high availability for your business, because a failure of the single read-only instance will lead to business disruption.
• As the time taken to recover a single read-only instance depends on the business data volume, the recovery time cannot be guaranteed. As a result, if your business requires high availability, we recommend you purchase at least two read-only instances for the RO group.

Relevant Operations

• You can create one or more read-only instances, which can be applied to read/write separation and one-source-multiple-replica application scenarios. For more information, please see Read-only Instances.
• You can create one or more read-only instances and put them in an RO group to ensure availability. For more information, please see RO Group of Read-only Instance.