How to divide a ER digram into multiple microservices

Question

I have a ER diagram and I want to divide it so I can implement multiple microservices

I used to implement monolithic type, is there a guideline on how to divide ER diagram into microservices?

For example, user microservice would have (user table, user type table). I have these table car part, car, country, complaint, shop?

score 2 · Answer 1 · answered Jun 27 '21 at 20:27

2

In the microservices architecture, the established way of defining microservices is known as decomposition by subdomain, which is a top-down approach, based on the bounded contexts of your system.

Once they're identified, you can then figure out the data access model that is appropriate (which tables should be used by each microservice).

So I would advise to follow that model, instead of going bottom-up, from the DB to the way microservices should be defined.

answered Jun 27 '21 at 20:27

Cosmin Ioniță

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There are, in my experience, few surer ways to a failed microservice migration than to take a relational DB schema (especially one that's been normalized) and allocate tables to microservices. – Levi Ramsey Jun 27 '21 at 23:01
Then what would suggest? – Ahmed Algosaibi Jun 28 '21 at 06:32
@LeviRamsey Completely agree that top-down approach might not be the best (or the fastest) option all the time. If it makes more sense to make it bottom-up, then I don't see any problem with that. – Cosmin Ioniță Jun 28 '21 at 06:49
If I want to start bottom-up, how should I go about it? – Ahmed Algosaibi Jun 28 '21 at 07:55

How to divide a ER digram into multiple microservices

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