High-Availability Edition

Last updated: 2020-11-10 15:22:17

    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 High-availability Edition.

    The High-availability Edition adopts a highly available one-source-one-replica architecture and supports real-time hot backup, automatic detection of failure, and automatic failover.

    Use Cases

    Ideal for industries such as gaming, internet, IoT, retail, e-commerce, logistics, insurance, and securities.


    • Offers two source/replica replication modes: async (default) and semi-sync. You can change the replication mode or upgrade to the Finance Edition (with the one-source-two-replica strong sync mode) on the instance details tab of the instance in the console.
    • Supports a complete set of features including read-only instances, disaster recovery instances, security groups, data migration, and multi-AZ deployment. For more information, see Strengths.
    • Achieves a high availability of up to 99.95%. For more information, see TencentDB Service Level Agreement (New Version).
    • Its data nodes are deployed on powerful hardware devices and its underlying storage uses local NVMe SSD disks with an IOPS of up to 240,000 (this value is the test result with MySQL's default page size of 16 KB and for your reference only. The actual value is subject to the specific configuration, page size, and business load).

    Basic Framework Diagram

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