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You'll have planned downtime just for upgrading MongoDB version or rebooting the instance. I don't think that this is sth you'd want to have. Running MongoDB in a replica set is really easy and much easier than running postgres or MySQL in an HA setup.

No need for SREs. Just add 2 more Hetzner servers.

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The sad part of that is that 3 Hetzner servers are still less than 20% of the price of equivalent AWS resources. This was already pretty bad when AWS started, but now it's reaching truly ridiculous proportions.

from the "Serverborse": i7-7700 with 64GB ram and 500G disk.

37.5 euros/month

This is ~8 vcpus + 64GB ram + 512G disk.

585 USD/month

It gets a lot worse if you include any non-negligible internet traffic. How many machines before for your company a team of SREs is worth it? I think it's actually dropped to 100.

Sure, I am not against Hetzner, it's great. I just find that running sth in HA mode is important for any service that is vital to customers. I am not saying that you need HA for a website. Also, I run many applications NOT in HA mode but those are single customer applications where it's totally fine to do maintenance at night or on the weekend. But for SaaS this is probably not a very good idea.

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