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Real-Time Disaster Recovery

Updated on 2025-02-17 GMT+08:00

For details about the supported databases and versions, see Supported Databases.

NOTE:

Only whitelisted users can use this function. To use this function, submit a service ticket. In the upper right corner of the management console, choose Service Tickets > Create Service Ticket.

Network Preparations

DRS supports disaster recovery through a Virtual Private Network (VPN), Direct Connect, or public network. Table 1 lists the application scenarios of each network type and required preparations, and Table 2 lists the supported network types of each DR scenario.

Table 1 Network types

Network Type

Application Scenario

Preparations

VPN

Disaster recovery from on-premises databases to cloud databases or between cloud databases across regions

Establish a VPN connection between your local data center and the VPC that hosts the destination database. Before disaster recovery, ensure that the VPN network is accessible.

For more information about VPN, see Getting Started with Virtual Private Network.

Direct Connect

Disaster recovery from on-premises databases to cloud databases or between cloud databases across regions

Use a dedicated network connection to connect your data center to VPCs.

For more information about Direct Connect, see Getting Started with Direct Connect.

Public network

Disaster recovery from on-premises databases or other cloud databases to destination databases.

To ensure network connectivity between the source and destination databases, perform the following operations:

  1. Enable public accessibility.

    Enable public accessibility for the source database based on your service requirements.

  2. Configure security group rules.
    • Add the EIPs of the disaster recovery instance to the whitelist of the source database for inbound traffic.
    • If destination databases and the DR instance are in the same VPC, they can communicate with each other by default. You do not need to configure a security group.
    NOTE:
    • The IP address on the Configure Source and Destination Databases page is the EIP of the DR instance.
    • If SSL is not enabled, backing up confidential data for disaster recovery is not recommended.
Table 2 Supported network types

DR Direction

Source DB

Destination DB

VPC

Public Network

VPN or Direct Connect

Current cloud as standby

MySQL

MySQL

Not supported

Supported

Supported

TaurusDB

Not supported

Supported

Supported

DDM

DDM

Not supported

Supported

Supported

TaurusDB

TaurusDB

Not supported

Supported

Supported

Current cloud as active

MySQL

MySQL

Not supported

Supported

Supported

DDM

DDM

Not supported

Supported

Supported

TaurusDB

TaurusDB

Not supported

Supported

Supported

Dual-Active DR

MySQL

NOTE:

Only whitelisted users can use this function.

MySQL

Not supported

Supported

Supported

TaurusDB

NOTE:

Only whitelisted users can use this function.

TaurusDB

Not supported

Supported

Supported

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