Documentation Home
MySQL Replication
Related Documentation Download this Excerpt
PDF (US Ltr) - 1.8Mb
PDF (A4) - 1.8Mb

MySQL Replication  /  Replication Notes and Tips  /  Replication Compatibility Between MySQL Versions

4.2 Replication Compatibility Between MySQL Versions

MySQL supports replication from one release series to the next higher release series. For example, you can replicate from a source running MySQL 5.6 to a replica running MySQL 5.7, from a source running MySQL 5.7 to a replica running MySQL 8.0, and so on. However, you might encounter difficulties when replicating from an older source to a newer replica if the source uses statements or relies on behavior no longer supported in the version of MySQL used on the replica. For example, foreign key names longer than 64 characters are no longer supported from MySQL 8.0.

The use of more than two MySQL Server versions is not supported in replication setups involving multiple sources, regardless of the number of source or replica MySQL servers. This restriction applies not only to release series, but to version numbers within the same release series as well. For example, if you are using a chained or circular replication setup, you cannot use MySQL 8.0.22, MySQL 8.0.24, and MySQL 8.0.28 concurrently, although you could use any two of these releases together.


It is strongly recommended to use the most recent release available within a given MySQL release series because replication (and other) capabilities are continually being improved. It is also recommended to upgrade sources and replicas that use early releases of a release series of MySQL to GA (production) releases when the latter become available for that release series.

From MySQL 8.0.14, the server version is recorded in the binary log for each transaction for the server that originally committed the transaction (original_server_version), and for the server that is the immediate source of the current server in the replication topology (immediate_server_version).

Replication from newer sources to older replicas might be possible, but is generally not supported. This is due to a number of factors:

  • Binary log format changes.  The binary log format can change between major releases. While we attempt to maintain backward compatibility, this is not always possible. A source might also have optional features enabled that are not understood by older replicas, such as binary log transaction compression, where the resulting compressed transaction payloads cannot be read by a replica at a release before MySQL 8.0.20.

    This also has significant implications for upgrading replication servers; see Section 4.3, “Upgrading a Replication Topology”, for more information.

  • For more information about row-based replication, see Section 5.1, “Replication Formats”.

  • SQL incompatibilities.  You cannot replicate from a newer source to an older replica using statement-based replication if the statements to be replicated use SQL features available on the source but not on the replica.

    However, if both the source and the replica support row-based replication, and there are no data definition statements to be replicated that depend on SQL features found on the source but not on the replica, you can use row-based replication to replicate the effects of data modification statements even if the DDL run on the source is not supported on the replica.

In MySQL 8.0.26, incompatible changes were made to replication instrumentation names, including the names of thread stages, containing the terms master, which is changed to source, slave, which is changed to replica, and mts (for multithreaded slave), which is changed to mta (for multithreaded applier). Monitoring tools that work with these instrumentation names might be impacted. If the incompatible changes have an impact for you, set the terminology_use_previous system variable to BEFORE_8_0_26 to make MySQL Server use the old versions of the names for the objects specified in the previous list. This enables monitoring tools that rely on the old names to continue working until they can be updated to use the new names.

For more information on potential replication issues, see Section 4.1, “Replication Features and Issues”.