Best Practices Summary

This document describes how to use Data Replication Service (DRS) to quickly migrate or synchronize databases in typical application scenarios.

**Table 1** DRS best practices
Function	Source DB Type	Destination DB	Cases
Real-Time Migration	MySQL databases on other clouds	Huawei Cloud RDS for MySQL instances	Migrating MySQL Databases from Other Clouds to RDS for MySQL
	MySQL databases on other clouds	Huawei Cloud GaussDB(for MySQL) instances	From Other Cloud MySQL to GaussDB(for MySQL)
	MongoDB databases on other clouds	Huawei Cloud DDS instances	From Other Cloud MongoDB to DDS
	On-premises MySQL databases	Huawei Cloud RDS for MySQL instances	From ECS-hosted MySQL to RDS for MySQL
	MySQL databases on ECSs	Huawei Cloud GaussDB(for MySQL) instances	From ECS-hosted MySQL to GaussDB(for MySQL)
	MongoDB databases on ECSs	Huawei Cloud DDS instances	From ECS-hosted MongoDB to DDS
	On-premises MySQL databases	Huawei Cloud RDS for MySQL instances	From On-Premises MySQL to RDS for MySQL
	On-premises MongoDB databases	Huawei Cloud DDS instances	From On-Premises MongoDB to DDS
	RDS for MySQL instances	Distributed Database Middleware (DDM) instances	From RDS for MySQL to DDM
	MySQL schema and logic table	Distributed Database Middleware (DDM) instances	From MySQL Schema and Logic Table to DDM
Backup Migration	On-premises Microsoft SQL Server databases	Huawei Cloud RDS for SQL Server instances	Migrating Microsoft SQL Server Backup Data to RDS SQL Server DB Instance
Real-Time Synchronization	PostgreSQL databases on other clouds	Huawei Cloud RDS for PostgreSQL instances	From Other Cloud PostgreSQL to RDS for PostgreSQL
	PostgreSQL databases on ECSs		From ECS-hosted PostgreSQL to RDS for PostgreSQL
	On-premises PostgreSQL databases		From On-Premises PostgreSQL to RDS for PostgreSQL
	On-premises MySQL databases	Huawei Cloud distributed GaussDB instances	From On-premises MySQL to GaussDB Distributed
	On-premises Oracle databases	Huawei Cloud distributed GaussDB instances	From On-premises Oracle to GaussDB Distributed
		Huawei Cloud primary/standby GaussDB instances	From On-premises Oracle to GaussDB Primary/Standby
		Distributed Database Middleware (DDM) instances	From On-Premises Oracle to DDM
	Huawei Cloud RDS for MySQL instances	DMS for Kafka	From RDS for MySQL to Kafka
	GaussDB Distributed	DMS for Kafka	From GaussDB Distributed to Kafka
	GaussDB Primary/Standby	DMS for Kafka	From GaussDB Primary/Standby to Kafka
Real-Time Disaster Recovery	Huawei Cloud RDS for MySQL instances	Huawei Cloud RDS for MySQL instances	Configuring Remote Single-Active DR for an RDS for MySQL Instance Using DRS