Should microservices have separate database?
- Do microservices need to have separate databases?
- Why each microservice should have its own database?
- Can microservices use same database?
Do microservices need to have separate databases?
As you described it very well above, each microservice needs to own it's DATA, which could be held within a dedicated database, within a dedicated schema (within a database), or even a set of dedicated tables (within a schema within a database).
Why each microservice should have its own database?
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.
Can microservices use 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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