This means for example, the following scenario is
5.6 master –> 5.7 slave
while these two scenarios are not supported:
5.5 master –> 5.7 slave
5.7 master –> 5.6 slave
That being said, in some contexts (e.g a MySQL upgrade) it can be valuable to be able to replicate from a master that is using a newer version of MySQL to an older version slave.
This could be used as part of a rollback strategy, and/or be needed in the case of upgrading a master-master replication topology.
The idea of the article is to provide you …[Read more]