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Can you give some pros and cons of using Azure Functions vs Azure Service Fabric? What are some of the reasons you would use Azure Service Fabric over Azure Functions?

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Those are completely unrelated products. Functions is a server-less philosophy kind of thing. SF is a cluster management and orchestration technology so obviously very server oriented (It manages servers)

When you look at stateless Microservices vs azure functions which you run all the time in app service, they both appear to overlap. My question was more focused here

So Functions could be treated as an opinionated, lightweight microservice framework, and thus you could compare it to other microservice frameworks like Service Fabric. Service Fabric is great for so many reasons. It can handle large, heavy duty applications. Functions is great for the opposite reasons, small & lightweight. You should be writing Functions like you'd write a unix tool; it should to one thing and do it well.

Cory is in the middle of a great talk where he helps "demystify" these services. (Which I can't find a link to right now...)

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