CQRS is probably the cause of the Microservices madness

Reads and Writes don’t have to live in the same database, data model or even the same service. Let us discuss CQRS

no separation

one service that does read/write

partial separation

You can keep one service but backend have multiple connections with different users same database

full separation

Read services / write services

two databases OLAP / OLTP

Pros

scalability

security

Cons

complex and very hard to follow, what we see with microservices..

resources

https://martinfowler.com/bliki/CQRS.html

http://codebetter.com/gregyoung/2010/02/16/cqrs-task-based-uis-event-sourcing-agh/