Why each microservice has its own database?

Question

It would allow you to pick the database technology which fits your Business requirement best in order to get the best performance or usage of it. For example some specific micro-service might have some Read-heavy operations with very complex filter options and a full text search requirement. 8 авг. 2019 г.

Should each microservice has its own DB?

Yes. In a microservice architecture (MSA) services own their data. A service's database is part of its implementation and is private. The data is exposed indirectly via the service's API.

Why do microservices need to separate databases?

Creating a separate database for each service helps to enforce domain boundaries, but it's only one approach. There's nothing stopping you from having all your services share the same database. As long as your services behave and don't do unexpected things to data owned by other services, you'll be fine.

Does microservices have same database?

In the shared-database-per-service pattern, the same database is shared by several microservices. You need to carefully assess the application architecture before adopting this pattern, and make sure that you avoid hot tables (single tables that are shared among multiple microservices).

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