How do I know my service boundaries before launching?
You often do not. Run the monolith and watch which features need independence. Then extract those. Premature splitting locks in unknowns.
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More FAQs in Service Boundaries: How to Decide What Becomes a Microservice
Use domain-driven design, look for bounded contexts, find features with independent change rates or scaling needs, and align with team structure. Let the real product teach you the boundaries.
A part of the domain that can be reasoned about independently. Auth is a bounded context. Chat is another. They have their own data, rules, and changes, which makes them good service candidates.
No. That is a layered architecture, not a service boundary. It couples services tightly because every request crosses all layers. Split by business domain instead.
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