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Nice article!

I'm curious on the decision from our two engineers to handle the database on their own for many of the initial phases instead of offloading to a fully managed database service in AWS (DDB or RDS depending on needs).

What could be the reasons they decided to host them in EC2 instances? Costs? A particular DB technology not offered as a service in AWS?

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RDS should be enough in this context. I forgot to mention it.

Thanks, Fran.

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To be fair, RDS is more expensive than self-hosting DB in EC2.

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How much will be the difference u think @jakub

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The cost difference can be significant, with self-hosting on EC2 potentially saving 40-60% compared to RDS, depending on the instance type and workload. However, it requires more management effort:

https://www.simform.com/blog/rds-vs-ec2/

https://medium.com/amazon-web-services/by-using-postgresql-on-ec2-save-40-to-60-cost-over-aws-rds-postgresql-e96afdd2210b

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