this post was submitted on 27 Oct 2025
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What I'm advocating for is the opposite of "allowing one entity to control everything".
https://en.wikipedia.org/wiki/Chaos_engineering#Chaos_Monkey
Read about it dude. Netflix has a large presence in all major cloud providers (and they have their own data centers), but has a service whose uptime is NOT dependent on any one of those hosting environments. The proof is the pudding - Netflix service did not go down in the recent AWS outage, nor in the last one.
All of that can be achieved WITHOUT completely abandoning public cloud services and having to completely host all of the hardware for their services.
Yes, Netflix had their own infrastucture in addition to other multiple redundant cloud services for their CDNs: You're kind of proving (part of) my point?
How? Their reliability would exist without that. There's nothing inherent to their own data center that makes their setup that much better. Having a distributed system across multiple cloud service providers means your actual chance of downtime (here I mean inverse of uptime) is their individual chances of uptime multiplied by each other. In other words, they all have to go down for your service to fail. The catch is you have to use only commodity IaaS and PaaS, nothing proprietary to one CSP.
For smaller companies especially, in terms of pure reliability, there's no reason to think that they would be better at running a high availability data center than Microsoft or AWS or Google.
Parallel distributed architectures give you the advantages of using public cloud (not having to physically manage your own data center) without the disadvantages (dependence on any one cloud vendor), while also potentially increasing your reliability beyond the reliability of any one of your cloud vendors . That is why Netflix is so rock solid.