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Is Lemmy's code base "good"?
(lemm.ee)
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this post was submitted on 03 Jul 2023
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There’s no reason that a monolith can’t scale. In fact you scale a monolith the same way you scale micro services.
The real reason to use micro services is because you can have individual teams own a small set of services. Lemmy isn’t built by a huge corporation though so that doesn’t really make sense.
I disagree that it being a monolith is immediately a problem, but also
This is just not true. With microservices, it is easy to scale out individual services to multiple instances as demand requires them. Hosting a fleet of entire Lemmy instances is far more expensive than just small slices of it that may require the additional processing power.
What microservices would you split Lemmy into? The database, image hosting and the UI are already separate.
Well, I'm going to start by repeating that I don't necessarily agree that it being monolithic is necessarily a problem right now.
The immediate thought in my mind would be all of the federation logic. That's where all of the instances seem to be lagging behind, and it seems the common fix is "just increase the workers to one billion". Apparently that does something meaningful, but the developer in me wants to know how a few cores can put so many workers to use.
Spinning federation off into a microservice means you could deploy it on something like Cloud Run or AWS ECS, and have it autoscale as the workload demands it. Seems like a pretty prime candidate to me.
To me this sounds like a code / DB problem more so than a monolith vs microservice issue. You can totally run only the worker part of a monolith inside AWS ECS and have it autoscale, this is not specific to microservices.