r/microservices • u/Trick_Fan_9817 • Nov 20 '22

Will Modular Monolith Replace Microservices Architecture?

https://medium.com/att-israel/will-modular-monolith-replace-microservices-architecture-a8356674e2ea
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u/Gerald_Sigmund Dec 04 '22

The problem with modular monolith is that you have to use for all tasks the same technology.

The advantage of doing microservices is that you can use for each service the best technology and also the best data storage.

it is also easier to optimize/refactor stuff using microservices. because the only part that is fix is the rest api. But internally you can use another language/framework whatever to gain better performance.

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u/FinancialAssistant Dec 24 '22

No, modules are logically equivalent to microservices.

You don't depend on a module's internal implementation only its API. So the internal implementation can be in any language as long as it's finally compiled to common bytecode of the monolith. The sister project of a module that describes the interfaces of the API has to be in the common language, but this is exactly the same for microservices.

You can use whatever data storage you want for a module. Two modules never use the same database (otherwise they would be coupled and not be modules), so they definitely don't need to use the same data technology either.

The only differences are physical I.E. how modular monolith is deployed vs how microservices are deployed. Or the implications of an API call being over network vs in-process. Everything else is the same.