I'm working on an ERP project for an educational institution. They have two branch offices and we need to keep records not only for customers but also class calendars, class reservations for teachers.
At the beginning I'll start with a cloud based web application but in the future I think I must replicate database at both two physical adresses also. Power outages and lost of internet connection is not rare in the city.
What kind of replication model do you recommend? Master-Master, Master-Slave, Mysql Group Replication? What about MySQL Cluster?