Supported Databases

DRS supports data flows between different DB engines. This section lists the supported databases in real-time migration, backup migration, real-time synchronization, data subscription, and real-time DR.

Real-Time Migration

You can migrate all database objects across cloud platforms, from on-premises databases to the cloud, or across regions on the cloud in real time. Table 1 lists the supported databases, versions, and migration types. For more information about real-time migration, see Real-Time Migration.

Self-built databases (such as MySQL and MongoDB) refer to on-premises databases and databases created on an ECS. RDS for MySQL refers to the MySQL databases on an RDS instance.

Some functions are only available for whitelisted users. To use these functions, submit a service ticket. In the upper right corner of the management console, choose Service Tickets > Create Service Ticket.
Data cannot be migrated from a newer version database to an older version database.

**Table 1** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Migration Type
MySQL	On-premises MySQL databases Versions 5.5, 5.6, 5.7, and 8.0 MySQL databases built on other clouds Versions 5.5, 5.6, 5.7, and 8.0	RDS for MySQL All versions	Full Full+Incremental
		DDM The same version as that of the associated RDS instance.	Full Full+Incremental
		GaussDB(for MySQL) Compatible with MySQL 8.0	Full Full+Incremental
	RDS for MySQL All versions	RDS for MySQL All versions	Full Full+Incremental
		Self-built or other cloud MySQL Versions 5.6, 5.7, and 8.0	Full Full+Incremental
		DDM The same version as that of the associated RDS instance.	Full Full+Incremental
		GaussDB(for MySQL) Compatible with MySQL 8.0	Full Full+Incremental
MongoDB	Self-built MongoDB Versions 3.2, 3.4, and 4.0 MongoDB on other clouds Versions 3.2, 3.4, and 4.0 DDS Versions 3.4 and 4.0 NOTE: The source does not support GaussDB(for Mongo).	DDS Versions 3.4, 4.0, and 4.2	Full Full+Incremental migration supports the following scenarios: Replica set -> Replica set Replica set -> Cluster Cluster -> Cluster NOTE: If the source is a DDS cluster instance, the incremental migration can only be performed in the VPC network. To perform a full plus incremental migration for a single node instance, the source database must be on the HUAWEI CLOUD.
MongoDB	Self-built MongoDB Versions 3.2, 3.4, and 4.0 MongoDB on other clouds Versions 3.2, 3.4, and 4.0 DDS Versions 3.4 and 4.0 NOTE: The source does not support GaussDB(for Mongo).	GaussDB(for Mongo) Versions 3.4 and 4.0 NOTE: Only whitelisted users can use this function.	Full Full+Incremental migration supports the following scenarios: Replica set -> Replica set Replica set -> Cluster Cluster -> Cluster NOTE: If the source is a DDS cluster, only full migration is supported.
DDS	DDS Versions 3.2, 3.4, and 4.0	Self-built MongoDB Versions 3.2, 3.4, and 4.0	Full Full+Incremental migration supports the following scenarios: Replica set -> Single node Replica set -> Replica set Replica set -> Cluster Single node -> Single node Single node -> Replica set Single node -> Cluster
DDS	DDS Versions 3.2, 3.4, and 4.0	MongoDB on other clouds Versions 3.2, 3.4, and 4.0	Full Full+Incremental migration supports the following scenarios: Replica set -> Single node Replica set -> Replica set Replica set -> Cluster Single node -> Single node Single node -> Replica set Single node -> Cluster
MySQL schema and logic table	DDM	DDM	Full Full+Incremental
Redis	Self-built open-source single-node Redis Versions 2.8.x, 3.0.x, 3.2.x, 4.0.x, and 5.0.x	GaussDB(for Redis) NOTE: Only whitelisted users can use this function.	Full Full+Incremental
Redis	GaussDB(for Redis)	Self-built open-source Codis Version 3.0 or later NOTE: Only whitelisted users can use this function.	Full+Incremental

Backup Migration

You can export data from the source database to a backup file, upload the backup file to OBS, and then restore the backup file to the destination database. In this way, data migration can be complete without exposing your source database to the Internet. Table 2 lists the supported databases, versions, and migration types. For more information about backup migration, see Backup Migration.

Data cannot be migrated from a newer version database to an older version database.

**Table 2** Database information
Backup File Version	Destination DB Version	Migration Method	Backup File Source
On-premises and cloud Microsoft SQL Server backup file versions: Microsoft SQL Server 2000 Microsoft SQL Server 2005 Microsoft SQL Server 2008 Microsoft SQL Server 2012 Microsoft SQL Server 2014 Microsoft SQL Server 2016 Microsoft SQL Server 2017 Microsoft SQL Server 2019	RDS for SQL Server Microsoft SQL Server 2008 Microsoft SQL Server 2012 Microsoft SQL Server 2014 Microsoft SQL Server 2016 Microsoft SQL Server 2017 Microsoft SQL Server 2019	Full Incremental	OBS bucket RDS full backup
RDS for SQL Server full backup file versions: Microsoft SQL Server 2008 Microsoft SQL Server 2012 Microsoft SQL Server 2014 Microsoft SQL Server 2016 Microsoft SQL Server 2017 Microsoft SQL Server 2019		Full Incremental	OBS bucket RDS full backup

Real-Time Synchronization

Real-time synchronization refers to the process of copying data from one data source to another database while keeping data consistency. In this way, the data of key services can flow in real time. Table 3 lists the supported databases, versions, and synchronization types. For more information about real-time synchronization, see Real-Time Synchronization.

Self-built databases (such as MySQL, Oracle, and PostgreSQL) refer to on-premises databases and databases created on an ECS. RDS for MySQL refers to the MySQL databases on an RDS instance.

Some functions are only available for whitelisted users. To use these functions, submit a service ticket. In the upper right corner of the management console, choose Service Tickets > Create Service Ticket.
Data cannot be migrated from a newer version database to an older version database.

**Table 3** Database information
Source DB Engine	Source DB Type and Version	Destination DB Type and Version	Synchronization Mode
MySQL	Self-built or other cloud MySQL Versions 5.5, 5.6, 5.7, and 8.0	RDS for MySQL All versions	Incremental Full+Incremental
		GaussDB(for MySQL) Version 8.0	Incremental Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		RDS for PostgreSQL Versions 9.5, 9.6, 10, and 11	Full Full+Incremental
		GaussDB distributed Version 1.0.0 or later	Full+Incremental
		GaussDB primary/standby Version 1.0.0 or later NOTE: Only whitelisted users can use this function.	Full+Incremental
		GaussDB(DWS) Version 8.1.3	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		Kafka Version 0.11 or later	Incremental Full+Incremental
		CSS/ES ElasticSearch 5.5, 6.2, 6.5, 7.1, 7.6, 7.9 and 7.10	Full+Incremental
	RDS for MySQL All versions	RDS for MySQL All versions	Incremental Full+Incremental
		Self-built or other cloud MySQL Versions 5.6, 5.7, and 8.0	Incremental Full+Incremental
		GaussDB(for MySQL) Version 8.0	Incremental Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		RDS for PostgreSQL Versions 9.5, 9.6, 10, and 11	Full Full+Incremental
		GaussDB distributed Version 1.0.0 or later	Full+Incremental
		GaussDB primary/standby Version 1.0.0 or later NOTE: Only whitelisted users can use this function.	Full+Incremental
		GaussDB(DWS) Version 8.1.3	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		Kafka Version 0.11 or later	Incremental Full+Incremental
		CSS/ES ElasticSearch 5.5, 6.2, 6.5, 7.1, 7.6, 7.9 and 7.10	Full+Incremental
		Self-built Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full+Incremental
PostgreSQL	Self-built PostgreSQL Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, and 14 RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, and 14 PostgreSQL on other clouds Versions 9.4, 9.5, 9.6, 10, 11, 12, 13, and 14	RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, 12, 13, and 14	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		GaussDB(DWS)	Full+Incremental
		GaussDB primary/standby	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		GaussDB distributed	Incremental Full Full+Incremental NOTE: Only whitelisted users can perform the incremental synchronization.
		Kafka Version 0.11 or later	Incremental
DDM	DDM	RDS for MySQL Versions 5.6 and 5.7	Full+Incremental
		Self-built or other cloud MySQL Versions 5.6 and 5.7	Full+Incremental
		DDM	Full+Incremental
		GaussDB(DWS)	Full+Incremental
		Self-built Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full+Incremental
		Kafka Version 0.11 or later	Incremental
Oracle	Oracle Versions 10g, 11g, 12c, 18c, and 19c	RDS for MySQL All versions	Full Full+Incremental
		GaussDB(for MySQL) Version 8.0	Full Full+Incremental
		RDS for PostgreSQL Versions 9.5, 9.6, 10, 11, and 12	Full Full+Incremental
		GaussDB primary/standby Version 1.0.0 or later	Incremental Full Full+Incremental
		GaussDB distributed Version 1.0.0 or later	Incremental Full Full+Incremental
		DDM	Full Full+Incremental
		GaussDB(DWS)	Full Full+Incremental
		Kafka Version 0.11 or later	Incremental
GaussDB distributed	GaussDB distributed Version 1.1.0 or later	RDS for MySQL Versions 5.6 and 5.7	Incremental
		Self-built or other cloud MySQL Versions 5.5, 5.6, and 5.7	Incremental
		Self-built Oracle Versions 11g and 19c	Full Incremental Full+Incremental
		GaussDB(DWS)	Full Incremental Full+Incremental NOTE: Only whitelisted users can perform the full+incremental synchronization.
		Kafka Version 0.11 or later	Incremental
		GaussDB distributed Version 1.1.0 or later	Full Incremental Full+Incremental
		GaussDB primary/standby Version 1.1.0 or later NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental
GaussDB primary/standby	GaussDB primary/standby Version 1.3 or later	RDS for MySQL Versions 5.6 and 5.7 NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental
		Self-built or other cloud MySQL Versions 5.5, 5.6, and 5.7 NOTE: Only whitelisted users can use this function.	Full Incremental Full+Incremental
		Oracle	Full Incremental Full+Incremental
		Kafka Version 0.11 or later	Incremental
		GaussDB(DWS)	Full Incremental Full+Incremental
		GaussDB distributed Version 1.1.0 or later	Full Incremental Full+Incremental
		GaussDB primary/standby Version 1.1.0 or later	Full Incremental Full+Incremental
GaussDB(for MySQL)	GaussDB(for MySQL) Version 8.0	RDS for MySQL Version 8.0	Incremental Full+Incremental
		Self-built or other cloud MySQL Version 8.0	Incremental Full+Incremental
		GaussDB(DWS)	Full+Incremental
		Kafka Version 0.11 or later	Incremental Full+Incremental
		CSS/ES ElasticSearch 5.5, 6.2, 6.5, 7.1, 7.6, 7.9 and 7.10	Full+Incremental
		Self-built Oracle Versions 10g, 11g, 12c, 18c, and 19c	Full+Incremental
MongoDB	Self-built MongoDB Versions 3.2, 3.4, and 4.0 MongoDB on other clouds Versions 3.2, 3.4, and 4.0 DDS Versions 3.4 and 4.0 NOTE: The source does not support GaussDB(for Mongo).	DDS Versions 3.4, 4.0, and 4.2 NOTE: DDS 4.2 can be used as the destination database only in the cloud migration scenario.	Full+Incremental migration supports the following scenarios: Replica set -> Replica set
DDS	DDS Versions 3.2, 3.4, and 4.0	Self-built MongoDB Versions 3.2, 3.4, and 4.0	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 3.2, 3.4, and 4.0	MongoDB on other clouds Versions 3.2, 3.4, and 4.0	Incremental synchronization supports the following modes: Replica set -> Replica set Cluster -> Cluster (the source cluster version must be 4.0 or later)
DB2 for LUW	DB2 for LUW Versions 9.7, 10.1, 10.5, 11.1, and 11.5	GaussDB distributed Version 1.1.0 or later NOTE: Only whitelisted users can use this function.	Full Full+Incremental
		GaussDB primary/standby Version 1.1.0 or later NOTE: Only whitelisted users can use this function.	Full Full+Incremental
		GaussDB(DWS)	Full Full+Incremental
TiDB	TiDB Version 4.0.0 and later (excluding the development version)	GaussDB(for MySQL) Version 8.0 NOTE: Only whitelisted users can use this function.	Full+Incremental
Microsoft SQL Server	Microsoft SQL Server Enterprise Edition 2012 or later Standard Edition 2016 SP1 or later	GaussDB(DWS) NOTE: Only whitelisted users can use this function.	Full+Incremental
		GaussDB distributed Version 1.1.0 or later NOTE: Only whitelisted users can use this function.	Full+Incremental
		GaussDB primary/standby Version 1.1.0 or later NOTE: Only whitelisted users can use this function.	Full+Incremental
		RDS for SQL Server Enterprise Edition 2012 or later Standard Edition 2016 SP1 or later NOTE: Only whitelisted users can use this function.	Full+Incremental

Data Subscription

Data subscription is used to obtain data changes of key services in the database. DRS caches the data changes and provides a unified SDK interface for downstream services to subscribe to, obtain, and consume the changes. Table 4 describes the supported databases and data types. For details about data subscription, see Data Subscription.

**Table 4** Database information
DB Engine	Data Type
RDS for MySQL Versions 5.6 and 5.7	Data update Structure update

Real-Time Disaster Recovery

To prevent service unavailability caused by regional faults, DRS provides disaster recovery to ensure service continuity. Table 5 lists the databases and versions supported by real-time DR. For more information about real-time DR, see Real-Time Disaster Recovery.

Self-built databases (for example, MySQL) refer to on-premises databases and the databases created on an ECS. RDS for MySQL refers to the MySQL databases on an RDS instance.

Some functions are only available for whitelisted users. To use these functions, submit a service ticket. In the upper right corner of the management console, choose Service Tickets > Create Service Ticket.
Data cannot be migrated from a newer version database to an older version database.

**Table 5** Database information
Service DB Engine	Service DB Type and Version	DR DB Type and Version
MySQL	Self-built or other cloud MySQL Versions 5.6, 5.7, and 8.0	RDS for MySQL All versions
	Self-built or other cloud MySQL Versions 5.6, 5.7, and 8.0	GaussDB(for MySQL) Version 8.0
	RDS for MySQL All versions	RDS for MySQL All versions
		Self-built or other cloud MySQL Versions 5.6, 5.7, and 8.0
		GaussDB(for MySQL) Version 8.0
DDM	DDM	DDM
GaussDB(for MySQL)	GaussDB(for MySQL) Version 8.0	GaussDB(for MySQL) Version 8.0