How to do data center level replication for MySQL/MySQL fork?

Question

MySQL

Hello everyone,
I am looking for the best way to implement MySQL replication or its fork of the level of 3 data centers:

1. 3 nodes in 3 data centers
   
2. unpredictable delays from 30ms and possibly loss of connection - I have repeatedly observed short-term local connectivity problems, when it is impossible to connect from one data center to the second, but it is possible to the third.
   
3. Reading exceeding writing by a thousand or more times
   
4. The minimum use of traffic for replication is desirable - traffic is paid
   
5. The speed of reading from the database is critical, but writing should also slow down
   
6. The worst option is master-slave replication. The application may be able to read from the slaves and write to the master.
   

Answer 1

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