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	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)
	TaurusDB	Incremental Full+Incremental	From MySQL to TaurusDB
	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 to self-built)
	GaussDB Centralized	Incremental Full Full+Incremental	From MySQL to GaussDB Centralized (To the cloud) From MySQL to GaussDB Centralized (Self-built to self-built)
	GaussDB(DWS)	Incremental Full Full+Incremental	From MySQL to GaussDB(DWS)
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 MySQL databases ECS-hosted MySQL databases	Kafka	Incremental Full+Incremental	From MySQL to Kafka (Self-built to self-built)
On-premises MySQL databases ECS-hosted MySQL databases	CSS/ES	Full+Incremental	From MySQL to CSS/ES (Self-built to 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 Centralized	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental data synchronization.	From PostgreSQL to GaussDB Centralized
	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 to self-built)
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)	Full+Incremental	From DDM to GaussDB(DWS)
	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
	TaurusDB	Full Full+Incremental	From Oracle to TaurusDB
	RDS for PostgreSQL	Full Full+Incremental	From Oracle to PostgreSQL
	GaussDB Centralized	Incremental Full Full+Incremental	From Oracle to GaussDB Centralized (To the cloud) From Oracle to GaussDB Centralized (Self-built to self-built)
	GaussDB Distributed	Incremental Full Full+Incremental	From Oracle to GaussDB Distributed (To the cloud) From Oracle to GaussDB Distributed (Self-built to 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 to 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 to self-built)
	GaussDB(DWS)	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 to self-built)
	GaussDB Distributed	Full Incremental Full+Incremental	From GaussDB Distributed to GaussDB Distributed From GaussDB Distributed to GaussDB Distributed (Self-built to self-built)
	GaussDB Centralized	Full Incremental Full+Incremental	From GaussDB Distributed to GaussDB Centralized (Out of the cloud) From GaussDB Distributed to GaussDB Centralized (Self-built to self-built)
GaussDB Centralized	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	Full Incremental Full+Incremental	From GaussDB Centralized to MySQL (Out of the cloud) From GaussDB Centralized to MySQL (Self-built to self-built)
	On-premises Oracle databases Oracle databases on an ECS	Full Incremental Full+Incremental	From GaussDB Centralized to Oracle (Out of the cloud) From GaussDB Centralized to Oracle (Self-built to self-built)
	Kafka	Incremental	From GaussDB Centralized to Kafka (Out of the cloud) From GaussDB Centralized to Kafka (Self-built to self-built)
	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental	From GaussDB Centralized to GaussDB(DWS)
	GaussDB Distributed	Full Incremental Full+Incremental	From GaussDB Centralized to GaussDB Distributed (Out of the cloud) From GaussDB Centralized to GaussDB Distributed (Self-built to self-built)
	GaussDB Centralized	Full Incremental Full+Incremental	From GaussDB Centralized to GaussDB Centralized From GaussDB Centralized to GaussDB Centralized (Self-built to self-built)
TaurusDB	TaurusDB	Incremental Full+Incremental	From TaurusDB to TaurusDB
	On-premises MySQL databases MySQL databases on an ECS MySQL databases on other clouds RDS for MySQL	Incremental Full+Incremental	From TaurusDB to MySQL
	GaussDB(DWS)	Full+Incremental	From TaurusDB to GaussDB(DWS)
	Kafka	Incremental Full+Incremental	From TaurusDB to Kafka
	CSS/ES	Full+Incremental	From TaurusDB to CSS/ES
	On-premises Oracle databases Oracle databases on an ECS	Full+Incremental	From TaurusDB 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 Centralized (To the cloud) From DB2 for LUW to GaussDB Centralized (Self-built to self-built)
DB2 for LUW	GaussDB Centralized	Full Full+Incremental	From DB2 for LUW to GaussDB Distributed (To the cloud) From DB2 for LUW to GaussDB Distributed (Self-built to self-built)
TiDB	TaurusDB	Full+Incremental	From TiDB to TaurusDB
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 Centralized	Incremental Full Full+Incremental	From Microsoft SQL Server to GaussDB Centralized
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
RDS for MariaDB	On-premises MariaDB databases MariaDB databases on an ECS MariaDB databases on other clouds	Full+Incremental	From MariaDB to MariaDB

Next topic: Data Synchronization Topologies

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