title: Microservices: database and microservice instances
body: <p>Lets say we have a microservice A and a B. B has its own database. However B has to be horizontally scaled, thus we end up having 3 instances of B. What happens to the database? Does it scale accordingly, does it stays the same (centralized) database for the 3 B instances, does it become a distributed database, what happens?</p>