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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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You definitely can't scale a monolith the same way you can scale a micro service
You can easily scale a monolith. You typically horizontally replicate any web server (monolith or not) to handle whatever traffic you're getting. It shouldn't really matter what type of traffic it is. Plenty of the world's biggest websites run monoliths in production. You know how people used to say "rails doesn't scale"? Well they were wrong because Rails monoliths are behind some huge companies like GitHub and Shopify.
The lemmy backend is also quite lightweight and parallel so it's cheap and effective to replicate.
In my professional experience microservices are usually a dumpster fire from both the dev perspective and an ops perspective (I'm a Site Reliability Engineer).
I can't say I disagree... Poorly implemented microservice architecture is the bane of my existence. Well implemented, though, and it makes my job so much easier.
Granted, my SRE team has all public facing production infrastructure built using an IAC process, if something causes too much trouble, it's easier to quarantine and rebuild the offending node(s), and can be complete in under 10 minutes.
The biggest problem is far too many developers ignore the best practices and just shift existing code into smaller services. That will never give you either performance or stability benefits. Honestly, it will probably make any issues worse. Microservice architecture is a huge shift in thinking. The services need to be fairly independent of each other to really make any gains. To get to that point will always take a whole lot of work. That being said, there is nothing inherently wrong with some monoliths, but the benefits of splitting out as much of the higher traffic and resource intensive work should never be overlooked.