Hello everyone and thanks in advance for your answers.
I describe the situation that arises to me. I have 4 bbdd that I have to keep exactly the same between two separate 10000km servers.
What solution would you give? If you need more information consult me.
For what you indicate, I would recommend a peer-to-peer transactional replication, to meet the requirements that they be exactly the same and that all four databases are accessible in read / write mode.
The only thing is that the edition of SQL Server 2016 is required to be Enterprise Edition, which, if you do not have them currently licensed as such, may incur an additional cost.
In the product documentation, exactly Peer-to-Peer -Transactional Replication , you can find more information on how to configure and use this replication scheme. There is even a diagram similar to your requirement in the topologies section.