In my case I have a main server with 3 databases: bdA, bdB, bdC. Then I have 3 secondary servers: sA, sB, sC. The server only has the bdA and it should only be synchronized with it. The sA changes must be reflected in the bdA of the main server in the same way that the changes made in the bdA of the main server must be reflected in the sA. In the same way the sB should only be synchronized with the bdB database and the sC should only be synchronized with the bdC database. Is it possible to use the circular replication of the mysql for this purpose? If not, is there any other way to achieve this goal? Thanks