Real-Time Synchronization

Real-time synchronization refers to the process of copying data from one data source to another database while keeping data consistent. In this way, data of critical workloads can move between different systems in real time. The following table lists the supported databases, versions, and synchronization types. For more information about real-time synchronization, see Real-Time Synchronization.

Self-managed databases (such as MySQL, Oracle, and PostgreSQL) include on-premises databases and databases created on ECSs. RDS for MySQL refers to the MySQL databases created using Huawei Cloud RDS.

Some functions are in restricted use. To use them, submit a service ticket.
The destination database version must be the same as or later than the source database version.

MySQL Serving as the Source in One-Way Synchronization

**Table 1** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
MySQL	Self-managed MySQL Versions 5.5, 5.6, 5.7, and 8.0 MySQL on other clouds Versions 5.5, 5.6, 5.7, and 8.0	RDS for MySQL All versions	Incremental Full Full+Incremental
		TaurusDB Compatible with MySQL 8.0	Incremental Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Full Full+Incremental
		GaussDB Distributed (MySQL-compatible) The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Incremental Full Full+Incremental
		GaussDB Centralized (B-compatible or M-compatible) The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Incremental Full Full+Incremental
		Kafka Version 0.11 or later	Incremental Full+Incremental
		RDS for MariaDB Version 10.5	Incremental Full Full+Incremental
	RDS for MySQL All versions	RDS for MySQL All versions	Incremental Full+Incremental
		Self-managed MySQL Versions 5.5, 5.6, 5.7, and 8.0 MySQL on other clouds Versions 5.5, 5.6, 5.7, and 8.0	Incremental Full+Incremental
		TaurusDB Compatible with MySQL 8.0	Incremental Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Full Full+Incremental
		GaussDB Distributed (MySQL-compatible) The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Incremental Full Full+Incremental
		GaussDB Centralized (B-compatible or M-compatible) The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Incremental Full Full+Incremental
		Kafka Version 0.11 or later	Incremental Full+Incremental
		Self-managed MariaDB Version 10.0, 10.1, 10.2, 10.3, 10.4, or 10.5 MariaDB on other clouds Version 10.0, 10.1, 10.2, 10.3, 10.4, or 10.5	Incremental Full Full+Incremental
		Self-managed Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full+Incremental

MySQL Serving as the Source in Two-Way Synchronization

**Table 2** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
MySQL	Self-managed MySQL Versions 5.5, 5.6, 5.7, and 8.0 MySQL on other clouds Versions 5.5, 5.6, 5.7, and 8.0 RDS for MySQL All versions	RDS for MySQL All versions	Full+Incremental NOTE: Two-way synchronization is in restricted use. To use it, submit a service ticket.
MySQL	RDS for MySQL All versions	Self-managed MySQL Versions 5.5, 5.6, 5.7, and 8.0 MySQL on other clouds Versions 5.5, 5.6, 5.7, and 8.0 RDS for MySQL All versions	Full+Incremental NOTE: Two-way synchronization is in restricted use. To use it, submit a service ticket.

MariaDB Serving as the Source in Synchronization

**Table 3** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
MariaDB	On-premises MariaDB 10.3, 10.4, and 10.5 ECS-hosted MariaDB 10.3, 10.4, and 10.5 Other cloud MariaDB 10.3, 10.4, and 10.5	RDS for MariaDB Version 10.5	Full+Incremental
MariaDB	RDS for MariaDB Version 10.5	On-premises MariaDB Version 10.5 MariaDB built on ECSs Version 10.5 MariaDB on other clouds Version 10.5	Full+Incremental
MariaDB	On-premises MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 ECS-hosted MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 on other clouds	RDS for MySQL Versions 5.6, 5.7, and 8.0	Incremental Full+Incremental
MariaDB	On-premises MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 ECS-hosted MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 MariaDB 10.0, 10.1, 10.2, 10.3, 10.4 and 10.5 on other clouds	TaurusDB Compatible with MySQL 8.0	Incremental Full+Incremental

PostgreSQL Serving as the Source in Synchronization

**Table 4** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
PostgreSQL	Self-managed PostgreSQL Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 PostgreSQL on other clouds Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Incremental Full Full+Incremental
	Self-managed PostgreSQL Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, and 16 PostgreSQL on other clouds Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, and 16 RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, and 16	GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Incremental Full Full+Incremental NOTE: Incremental synchronization is in restricted use. To use it, submit a service ticket.
		GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Incremental Full Full+Incremental NOTE: Incremental synchronization is in restricted use. To use it, submit a service ticket.
	RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Kafka Version 0.11 or later	Incremental
	RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Self-managed PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Incremental Full Full+Incremental
	Self-managed PostgreSQL Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 PostgreSQL on other clouds Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Kafka Version 0.11 or later	Incremental

Oracle Serving as the Source in Synchronization

**Table 5** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
Oracle	Self-managed Oracle Versions 10g, 11g, 12c, 18c, 19c, and 21c	RDS for MySQL All versions	Incremental Full Full+Incremental
		TaurusDB Compatible with MySQL 8.0	Full Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16	Full Full+Incremental
		GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Incremental Full Full+Incremental
		GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Incremental Full Full+Incremental
		DDM	Full Full+Incremental
		Kafka Version 0.11 or later	Incremental

DDM Serving as the Source in Synchronization

**Table 6** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
DDM	DDM	RDS for MySQL All versions	Incremental Full Full+Incremental
		Self-managed or other cloud MySQL Versions 5.6, 5.7, and 8.0	Incremental Full Full+Incremental
		DDM Based on the live network	Full+Incremental
		GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Full Full+Incremental
		GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions	Full Full+Incremental
		Self-managed Oracle Versions 10g, 11g, 12c, 18c, and 19c	Incremental Full Full+Incremental
		Kafka Version 0.11 or later	Incremental

TaurusDB Serving as the Source in Synchronization

**Table 7** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
TaurusDB	TaurusDB Version 8.0	RDS for MySQL Version 8.0 Self-managed or other cloud MySQL Version 8.0	Incremental Full+Incremental
		TaurusDB Compatible with MySQL 8.0	Incremental Full+Incremental
		Kafka Version 0.11 or later	Incremental Full+Incremental
		Self-managed Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full+Incremental

GaussDB Distributed Serving as the Source in Synchronization

**Table 8** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
TaurusDB Distributed	GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	RDS for MySQL Versions 5.6, 5.7, and 8.0	Full Incremental Full+Incremental
		Self-managed or other cloud MySQL Versions 5.5, 5.6, 5.7, and 8.0	Full Incremental Full+Incremental
		Self-managed Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full Incremental Full+Incremental
		Kafka Version 0.11 or later	Incremental
		GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 Self-managed PostgreSQL 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Incremental Full+Incremental

GaussDB Centralized Serving as the Source in Synchronization

**Table 9** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
GaussDB Centralized	GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	RDS for MySQL Versions 5.6, 5.7, and 8.0	Full Incremental Full+Incremental
		Self-managed or other cloud MySQL Versions 5.5, 5.6, 5.7, and 8.0	Full Incremental Full+Incremental
		Self-managed Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full Incremental Full+Incremental
		Kafka Version 0.11 or later	Incremental
		GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 Self-managed PostgreSQL 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Incremental Full+Incremental

MongoDB Serving as the Source in Synchronization

**Table 10** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
MongoDB	Self-managed MongoDB Versions 3.2, 3.4, 3.6, 4.0, 4.2, 4.4, and 5.0 MongoDB on other clouds Versions 3.2, 3.4, 3.6, 4.0, 4.2, 4.4, and 5.0 DDS Versions 3.2, 3.4, 4.0, 4.2, 4.4, and 5.0 NOTE: The source does not support GeminiDB Mongo.	DDS Versions 3.4, 4.0, 4.2, 4.4, and 5.0	Full+Incremental synchronization supports the following scenarios: Replica set -> Replica set Replica set -> Cluster Cluster -> Replica set Cluster -> Cluster

DDS Serving as the Source in Synchronization

**Table 11** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
DDS	DDS Versions 3.2, 3.4, 4.0, 4.2, 4.4, and 5.0	Self-managed MongoDB Versions 3.2, 3.4, 3.6, 4.0, 4.2, 4.4, and 5.0 MongoDB on other clouds Versions 3.2, 3.4, 3.6, 4.0, 4.2, 4.4, and 5.0	Incremental synchronization supports the following modes: Replica set -> Replica set Cluster -> Cluster (the source cluster version must be 4.0 or later)
DDS	DDS Versions 4.0, 4.2, 4.4, and 5.0	Kafka Version 0.11 or later	Incremental

DB2 for LUW Serving as the Source in Synchronization

**Table 12** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
DB2 for LUW	DB2 for LUW Versions 9.7, 10.1, 10.5, 11.1, and 11.5	GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Full+Incremental
DB2 for LUW	DB2 for LUW Versions 9.7, 10.1, 10.5, 11.1, and 11.5	GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Full+Incremental

TiDB Serving as the Source in Synchronization

**Table 13** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
TiDB	TiDB Version 4.0.0 and later (excluding the development version)	TaurusDB Compatible with MySQL 8.0	Full+Incremental

Microsoft SQL Server as the Source in Synchronization

**Table 14** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
Microsoft SQL Server	Self-managed Microsoft SQL Server Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022 Microsoft SQL Server-compatible databases on other clouds Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022 RDS for SQL Server Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022	GaussDB Distributed The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		GaussDB Centralized The database kernel version is 505.2 or earlier. Mapping Between Kernel Versions and DB Engine Versions.	Full Incremental Full+Incremental
		Self-managed Microsoft SQL Server Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022 Microsoft SQL Server-compatible databases on other clouds Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022 RDS for SQL Server Enterprise Edition 2012, 2014, 2016, 2017, 2019 and 2022 Standard Edition 2016 SP2 or later, 2017, 2019 and 2022	Full+Incremental Incremental
		Kafka Version 0.11 or later NOTE: This function is in restricted use. To use it, submit a service ticket.	Incremental
		RDS for MySQL Versions 5.5, 5.6, 5.7, and 8.0 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Incremental Full+Incremental
		TaurusDB Compatible with MySQL 8.0 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Incremental Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, 14, 15, and 16 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Incremental Full+Incremental

Cassandra Serving as the Source in Synchronization

**Table 15** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
Cassandra	Self-managed Cassandra Version 2.0 or later	GeminiDB Cassandra Version 2.0 or later	Full

DynamoDB Serving as the Source in Synchronization

**Table 16** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
DynamoDB	DynamoDB on other clouds (web services)	GeminiDB DynamoDB-Compatible API Version 3.11 NOTE: This function is in restricted use. To use it, submit a service ticket.	Full Full+Incremental
GeminiDB DynamoDB-Compatible API	GeminiDB DynamoDB-Compatible API 3.11	DynamoDB on other clouds (web services) NOTE: This function is in restricted use. To use it, submit a service ticket.	Full+Incremental Incremental

Redis Serving as the Source in Synchronization

**Table 17** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
Redis	On-premises official open-source single-node or primary/standby Redis (versions 2.8.x, 3.0.x, 3.2.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) ECS-hosted official open-source single-node or primary/standby Redis (versions 2.8.x, 3.0.x, 3.2.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x)	GeminiDB Redis (classic deployment: Proxy Cluster and Primary/Standby; cloud native deployment: Proxy Cluster) NOTE: The destination database version must be the same as or later than the source database version.	Full Full+Incremental

Redis Cluster Serving as the Source in Synchronization

**Table 18** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
Redis Cluster	On-premises office open-source Redis Cluster (versions 3.0.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) ECS-hosted official open-source Redis Cluster (versions 3.0.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x)	GeminiDB Redis (classic deployment: Proxy Cluster and Primary/Standby; cloud native deployment: Proxy Cluster) NOTE: The destination database version must be the same as or later than the source database version.	Full+Incremental

GeminiDB Redis Serving as the Source in Synchronization

**Table 19** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
GeminiDB Redis	GeminiDB Redis (classic deployment: Proxy Cluster and Primary/Standby; cloud native deployment: Proxy Cluster) NOTE: GeminiDB Redis performance-enhanced instances cannot be migrated out of the cloud.	On-premises Codis clusters (open-source Codis 3.0 or later) ECS-hosted Codis clusters (open-source Codis 3.0 or later) On-premises single-node Redis (versions 2.8.x, 3.0.x, 3.2.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) ECS-hosted single-node Redis (versions 2.8.x, 3.0.x, 3.2.x, 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) On-premises primary/standby Redis (versions 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) ECS-hosted primary/standby Redis (versions 4.0.x, 5.0.x, 6.0.x, 6.2.x, 7.0.x, and 7.2.x) GeminiDB Redis (classic deployment: Proxy Cluster Redis and Primary/Standby Redis)	Incremental Full+Incremental
GeminiDB Redis		ECS-hosted Redis Cluster (open-source Redis 4.0 or later) On-premises Redis Cluster (open-source Redis 4.0 or later)	Incremental Full+Incremental