Workload Replay

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

Database Types

DRS supports workload replay management for the following types of databases.

**Table 1** Database types
Replay Direction	Data Flow	Source DB	Destination DB	Destination DB Type
Current cloud	MySQL->MySQL	RDS for MySQL instances	RDS for MySQL instances	Single Primary/Standby
Current cloud	MySQL->GaussDB(for MySQL)	RDS for MySQL instances	GaussDB(for MySQL) instances	Primary/Standby
Current cloud	GaussDB(for MySQL)->GaussDB(for MySQL)	GaussDB(for MySQL) instances	GaussDB(for MySQL) instances	Primary/Standby
To the cloud	MySQL->MySQL	On-premises MySQL databases ECS-hosted MySQL databases MySQL databases on other clouds	RDS for MySQL instances	Single Primary/Standby
To the cloud	MySQL->GaussDB(for MySQL)	On-premises MySQL databases ECS-hosted MySQL databases MySQL databases on other clouds	GaussDB(for MySQL) instances	Primary/Standby

Database Versions

**Table 2** Database versions
Replay Direction	Data Flow	Source DB Version	Destination Database Version
Current cloud	MySQL->MySQL	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x
Current cloud	MySQL->GaussDB(for MySQL)	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x	Compatible with MySQL 8.0
Current cloud	GaussDB(for MySQL)->GaussDB(for MySQL)	Compatible with MySQL 8.0	Compatible with MySQL 8.0
To the cloud	MySQL->MySQL	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x
To the cloud	MySQL->GaussDB(for MySQL)	MySQL 5.6.x MySQL 5.7.x MySQL 8.0.x	Compatible with MySQL 8.0

Network Types

DRS supports workload replay through a Virtual Private Cloud (VPC), Virtual Private Network (VPN), Direct Connect, or public network. Table 3 lists the application scenarios of each network type and required preparations, and Table 4 lists the supported network types of each workload replay scenario.

**Table 3** Network types
Network Type	Application Scenario	Preparations
VPC	Workload replay between cloud databases in the same region	The source and destination databases must be in the same region. The source and destination databases can be in either the same VPC or in different VPCs. If source and destination databases are in the same VPC, they can communicate with each other by default. You do not need to configure a security group. If the source and destination databases are not in the same VPC, the CIDR blocks of the source and destination databases cannot be duplicated or overlapped, and the source and destination databases are connected through a VPC peering connection. DRS does not support communication between the source database and destination database over a VPC across tenants. If necessary, you can create a VPC peering connection and select VPN for Network Type to enable communication between the source and destination databases. For details about how to create a VPC peering connection, see Virtual Private Cloud User Guide.
VPN	Workload replay 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 workload replay, ensure that the VPN network is accessible. For more information about VPN, see Getting Started with Virtual Private Network.
Direct Connect	Workload replay 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	Workload replay 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: Enable public accessibility. Enable public accessibility for the source database based on your service requirements. Configure security group rules. Add the EIPs of the DRS instance to the whitelist of the source database for inbound traffic. If destination databases and the DRS 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 displayed on the Configure Source and Destination Databases page is the EIP of the DRS instance.

**Table 4** Supported network types
Replay Direction	Source DB	Destination DB	VPC	Public Network	VPN or Direct Connect
Current cloud	MySQL	MySQL	Supported	Supported	Supported
Current cloud	MySQL	GaussDB(for MySQL)	Supported	Supported	Supported
Current cloud	GaussDB(for MySQL)	GaussDB(for MySQL)	Supported	Supported	Supported
To the cloud	MySQL	MySQL	Supported	Supported	Supported
To the cloud	MySQL	GaussDB(for MySQL)	Supported	Supported	Supported