DM supports migrating data from different sources to TiDB clusters. Based on the data source type, DM has four compatibility levels:
Generally available (GA): The application scenario has been verified and passed the GA test.
Experimental: Although the application scenario has been verified, the test does not cover all scenarios or involves only a limited number of users. The application scenario might encounter problems occasionally.
Not tested: DM is expected to be always compatible with MySQL during iteration. However, due to resource constraints, not all MySQL forks are tested with DM. Therefore, the not tested source or target is technically compatible with DM, but is not fully tested, which means you need to verify its compatibility before you use.
Incompatible: DM is proved to be incompatible with the data source and the application is not recommended for use in production environments.
Data sources
Data source
Compatibility level
Remarks
MySQL ≤ 5.5
Not tested
MySQL 5.6
GA
MySQL 5.7
GA
MySQL 8.0
Experimental
MariaDB < 10.1.2
Incompatible
Incompatible with binlog of the time type
MariaDB 10.1.2 ~ 10.5.10
Experimental
MariaDB > 10.5.10
Incompatible
Permission errors reported in the check procedure
Target databases
Warning
DM v5.3.0 is not recommended. If you have enabled GTID replication but do not enable relay log in DM v5.3.0, data replication fails with low probability.
