Synchronization Overview

Real-time synchronization refers to the real-time flow of key service data from sources to destinations while consistency of data can be ensured.

It is different from migration. Migration means moving your overall database from one platform to another. Synchronization refers to the continuous flow of data between different services.

You can use real-time synchronization in many scenarios such as real-time analysis, report system, and data warehouse environment.

Real-time synchronization is mainly used for synchronizing tables and data. It can meet various requirements, such as many-to-one, one-to-many synchronization, dynamic addition and deletion of tables, and synchronization between tables with different names.

Figure 1 Real-time synchronization principle

Supported Database Types

The following table lists the source database and destination database types supported by DRS in real-time synchronization.

**Table 1** Synchronization scheme
Source DB Type	Destination DB Type	Synchronization Mode	Related Documents
On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	RDS for MySQL	Incremental Full Full+Incremental	From MySQL to MySQL (To the cloud)
	GaussDB(for MySQL)	Incremental Full+Incremental	From MySQL to GaussDB(for MySQL)
	RDS for PostgreSQL	Full Full+Incremental	From MySQL to PostgreSQL
	GaussDB distributed	Incremental Full Full+Incremental	From MySQL to GaussDB Distributed (To the cloud) From MySQL to GaussDB Distributed (self-built - self-built)
	GaussDB primary/standby	Incremental Full Full+Incremental	From MySQL to GaussDB Primary/Standby (To the cloud) From MySQL to GaussDB Primary/Standby (self-built - self-built)
	GaussDB(DWS) NOTE: This service is currently not supported. Use DataArts Studio for data synchronization.	Incremental Full Full+Incremental	From MySQL to GaussDB(DWS) DataArts Studio
	RDS for MariaDB	Incremental Full Full+Incremental	From MySQL to MariaDB (To the cloud)
RDS for MySQL	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds	Incremental Full+Incremental	From MySQL to MySQL (Out of the cloud)
	Kafka	Incremental Full+Incremental	From MySQL to Kafka (Out of the cloud)
	CSS/ES	Full+Incremental	From MySQL to CSS/ES (Out of the cloud)
	On-premises Oracle databases Oracle databases on an ECS	Full+Incremental	From MySQL to Oracle
	On-premises MariaDB databases MariaDB databases on an ECS MariaDB databases on other clouds	Incremental Full Full+Incremental	From MySQL to MariaDB (Out of the cloud)
On-premises MySQL databases MySQL databases on an ECS	Kafka	Incremental Full+Incremental	From MySQL to Kafka (self-built - self-built)
On-premises MySQL databases MySQL databases on an ECS	CSS/ES	Full+Incremental	From MySQL to CSS/ES (self-built - self-built)
On-premises PostgreSQL databases PostgreSQL databases on an ECS PostgreSQL databases on other clouds RDS for PostgreSQL	RDS for PostgreSQL	Incremental Full Full+Incremental	From PostgreSQL to PostgreSQL
	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full+Incremental	From PostgreSQL to GaussDB(DWS)
	GaussDB primary/standby	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental data synchronization.	From PostgreSQL to GaussDB Primary/Standby
	GaussDB distributed	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental data synchronization.	From PostgreSQL to GaussDB Distributed
On-premises PostgreSQL databases PostgreSQL databases on an ECS	Kafka	Incremental	From PostgreSQL to Kafka (self-built - self-built)
RDS for PostgreSQL	On-premises PostgreSQL databases PostgreSQL databases on ECSs	Incremental Full Full+Incremental	From PostgreSQL to PostgreSQL (Out of the cloud)
RDS for PostgreSQL	Kafka	Incremental	From PostgreSQL to Kafka (Out of the cloud)
DDM	RDS for MySQL	Incremental Full Full+Incremental	From DDM to MySQL (To the cloud)
	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds	Incremental Full Full+Incremental	From DDM to MySQL (Out of the cloud)
	DDM	Full+Incremental	From DDM to DDM
	GaussDB(DWS) NOTE: This service is currently not supported. Use DataArts Studio for data synchronization.	Full+Incremental	From DDM to GaussDB(DWS) DataArts Studio
	On-premises Oracle databases Oracle databases on an ECS	Incremental Full Full+Incremental	From DDM to Oracle
	Kafka	Incremental	From DDM to Kafka
On-premises Oracle databases Oracle databases on an ECS	RDS for MySQL	Incremental Full Full+Incremental	From Oracle to MySQL
	GaussDB(for MySQL)	Full Full+Incremental	From Oracle to GaussDB(for MySQL)
	RDS for PostgreSQL	Full Full+Incremental	From Oracle to PostgreSQL
	GaussDB primary/standby	Incremental Full Full+Incremental	From Oracle to GaussDB Primary/Standby (To the cloud) From Oracle to GaussDB Primary/Standby (self-built - self-built)
	GaussDB distributed	Incremental Full Full+Incremental	From Oracle to GaussDB Distributed (To the cloud) From Oracle to GaussDB Distributed (self-built - self-built)
	DDM	Full Full+Incremental	From Oracle to DDM
	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Incremental Full Full+Incremental	From Oracle to GaussDB(DWS)
	Kafka	Incremental	From Oracle to Kafka
GaussDB distributed	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	Full Incremental Full+Incremental	From GaussDB Distributed to MySQL (Out of the cloud) From GaussDB Distributed to MySQL (self-built - self-built)
	On-premises Oracle databases Oracle databases on an ECS	Full Incremental Full+Incremental	From GaussDB Distributed to Oracle (Out of the cloud) From GaussDB Distributed to Oracle (self-built - self-built)
	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental	From GaussDB Distributed to GaussDB(DWS)
	Kafka	Incremental	From GaussDB Distributed to Kafka (Out of the cloud) From GaussDB Distributed to Kafka (self-built - self-built)
	GaussDB distributed	Full Incremental Full+Incremental	From GaussDB Distributed to GaussDB Distributed From GaussDB Distributed to GaussDB Distributed (self-built - self-built)
	GaussDB primary/standby	Full Incremental Full+Incremental	From GaussDB Distributed to GaussDB Primary/Standby (Out of the cloud) From GaussDB Distributed to GaussDB Primary/Standby (self-built - self-built)
GaussDB primary/standby	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	Full Incremental Full+Incremental	From GaussDB Primary/Standby to MySQL (Out of the cloud) From GaussDB Primary/Standby to MySQL (self-built - self-built)
	On-premises Oracle databases Oracle databases on an ECS	Full Incremental Full+Incremental	From GaussDB Primary/Standby to Oracle (Out of the cloud) From GaussDB Primary/Standby to Oracle (self-built - self-built)
	Kafka	Incremental	From GaussDB Primary/Standby to Kafka (Out of the cloud) From GaussDB Primary/Standby to Kafka (self-built - self-built)
	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental	From GaussDB Primary/Standby to GaussDB(DWS)
	GaussDB distributed	Full Incremental Full+Incremental	From GaussDB Primary/Standby to GaussDB Distributed (Out of the cloud) From GaussDB Primary/Standby to GaussDB Distributed (self-built - self-built)
	GaussDB primary/standby	Full Incremental Full+Incremental	From GaussDB Primary/Standby to GaussDB Primary/Standby From GaussDB Primary/Standby to GaussDB Primary/Standby (self-built - self-built)
GaussDB(for MySQL)	GaussDB(for MySQL)	Incremental Full+Incremental	From GaussDB(for MySQL) to GaussDB(for MySQL)
	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	Incremental Full+Incremental	From GaussDB(for MySQL) to MySQL
	GaussDB(DWS) NOTE: This service is currently not supported. Use DataArts Studio for data synchronization.	Full+Incremental	From GaussDB(for MySQL) to GaussDB(DWS) DataArts Studio
	Kafka	Incremental Full+Incremental	From GaussDB(for MySQL) to Kafka
	CSS/ES	Full+Incremental	From GaussDB(for MySQL) to CSS/ES
	On-premises Oracle databases Oracle databases on an ECS	Full+Incremental	From GaussDB(for MySQL) to Oracle
DDS	Self-built MongoDB MongoDB on other clouds	Incremental synchronization supports the following modes: Replica set -> Replica set Cluster -> Cluster (the source cluster version must be 4.0 or later)	From DDS to MongoDB
DDS	Kafka	Incremental	From DDS to Kafka
DB2 for LUW	GaussDB distributed	Full Full+Incremental	From DB2 for LUW to GaussDB Primary/Standby (To the cloud) From DB2 for LUW to GaussDB Primary/Standby (self-built - self-built)
DB2 for LUW	GaussDB primary/standby	Full Full+Incremental	From DB2 for LUW to GaussDB Distributed (To the cloud) From DB2 for LUW to GaussDB Distributed (self-built - self-built)
TiDB	GaussDB(for MySQL)	Full+Incremental	From TiDB to GaussDB(for MySQL)
On-premises Microsoft SQL Server databases ECS-hosted Microsoft SQL Server databases Microsoft SQL Server-compatible databases on other clouds RDS for SQL Server	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full+Incremental	From Microsoft SQL Server to GaussDB(DWS)
	GaussDB primary/standby	Incremental Full Full+Incremental	From Microsoft SQL Server to GaussDB Primary/Standby
	GaussDB distributed	Incremental Full Full+Incremental	From Microsoft SQL Server to GaussDB Distributed
	Microsoft SQL Server	Full+Incremental	From Microsoft SQL Server to Microsoft SQL Server
	RDS for MySQL NOTE: Only whitelisted users can use this function.	Incremental Full Full+Incremental	From Microsoft SQL Server to MySQL
	GaussDB(for MySQL) NOTE: Only whitelisted users can use this function.	Incremental Full Full+Incremental	From Microsoft SQL Server to GaussDB(for MySQL)
	PostgreSQL NOTE: Only whitelisted users can use this function.	Incremental Full Full+Incremental	From Microsoft SQL Server to PostgreSQL
RDS for SQL Server	Kafka NOTE: Only whitelisted users can use this function.	Incremental	From Microsoft SQL Server to Kafka (Out of the cloud)
On-premises Microsoft SQL Server databases ECS-hosted Microsoft SQL Server databases Microsoft SQL Server-compatible databases on other clouds	Kafka NOTE: Only whitelisted users can use this function.	Incremental	From Microsoft SQL Server to Kafka (self-built - self-built)
On-premises MongoDB databases MongoDB databases on an ECS MongoDB database on other clouds DDS	DDS	Full+Incremental synchronization supports the following scenarios: Replica set -> Replica set	From MongoDB to DDS
On-premises MariaDB databases MariaDB databases on an ECS MariaDB databases on other clouds	RDS for MariaDB	Full+Incremental	From MariaDB to MariaDB
On-premises MariaDB databases MariaDB databases on an ECS MariaDB databases on other clouds	RDS for MySQL	Incremental Full+Incremental	From MariaDB to MySQL
	GaussDB(for MySQL)	Incremental Full+Incremental	From MariaDB to GaussDB(for MySQL)
RDS for MariaDB	On-premises MariaDB databases MariaDB databases on an ECS MariaDB databases on other clouds	Full+Incremental	From MariaDB to MariaDB
Cassandra	GeminiDB Cassandra	Full	From Cassandra to GeminiDB Cassandra
DynamoDB on other clouds (web services)	GeminiDB Dynamo NOTE: Only whitelisted users can use this function.	Full Full+Incremental	From Dynamo to GeminiDB Dynamo

**Table 2** Synchronization solutions
Source Database Cloud Vendor	Source Database Type	Destination Database (Huawei Cloud)	Solution
AWS	RDS for MySQL	RDS for MySQL	From MySQL to MySQL
AWS	RDS for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
AWS	Aurora for MySQL	RDS for MySQL	From MySQL to MySQL
AWS	Aurora for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
AWS	RDS for MariaDB	RDS for MariaDB	From MariaDB to MariaDB
AWS	RDS for PostgreSQL	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
AWS	Aurora for PostgreSQL (Non-serverless)	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
AWS	RDS for Oracle	GaussDB Primary/Standby	From Oracle to GaussDB Primary/Standby
AWS	RDS for Oracle	GaussDB Distributed	From Oracle to GaussDB Distributed
AWS	RDS for SQL Server	RDS for SQL Server	From Microsoft SQL Server to Microsoft SQL Server
Azure	Database for MySQL	RDS for MySQL	From MySQL to MySQL
Azure	Database for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Azure	Database for MariaDB	RDS for MariaDB	From MariaDB to MariaDB
Azure	Database for PostgreSQL	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
Azure	SQL Server on Azure Virtual Machines	RDS for SQL Server	From Microsoft SQL Server to Microsoft SQL Server
Google	Cloud SQL for MySQL	RDS for MySQL	From MySQL to MySQL
Google	Cloud SQL for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Google	Cloud SQL for PostgreSQL	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
Alibaba Cloud	ApsaraDB RDS for MySQL	RDS for MySQL	From MySQL to MySQL
Alibaba Cloud	ApsaraDB RDS for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Alibaba Cloud	PolarDB for MySQL	RDS for MySQL	From MySQL to MySQL
Alibaba Cloud	PolarDB for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Alibaba Cloud	ApsaraDB RDS for MariaDB	RDS for MariaDB	From MariaDB to MariaDB
Alibaba Cloud	ApsaraDB RDS for PostgreSQL	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
Alibaba Cloud	PolarDB for PostgreSQL Standard Edition and Enterprise Edition	RDS for PostgreSQL	From PostgreSQL to PostgreSQL
Tencent Cloud	TencentDB for MySQL	RDS for MySQL	From MySQL to MySQL
Tencent Cloud	TencentDB for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Tencent Cloud	TDSQL-C for MySQL	RDS for MySQL	From MySQL to MySQL
Tencent Cloud	TDSQL-C for MySQL	GaussDB(for MySQL)	From MySQL to GaussDB(for MySQL)
Tencent Cloud	TencentDB for PostgreSQL	RDS for PostgreSQL	From PostgreSQL to PostgreSQL

Feedback

Was this page helpful?

Helpful Not helpful

Provide feedback

Thank you very much for your feedback. We will continue working to improve the documentation.See the reply and handling status in My Cloud VOC.

The system is busy. Please try again later.

Which of the following issues have you encountered?

Content is inconsistent with the product UI

Unclear descriptions

Lack of examples or code

Incorrect steps

Can't find what I need

Lack of best practices

Feedback (optional)

0/500

Select at least one type of issue, and enter your comments or suggestions.

Enter a maximum of 500 characters.

Submit Cancel

For any further questions, feel free to contact us through the chatbot.

Chatbot

Synchronization Overview

Supported Database Types

Other Cloud Synchronization Solutions

Feedback

Was this page helpful?