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Joined 9 months ago
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Cake day: December 18th, 2023

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  • Banking is extremely variable. Instant transactions are periodic, I don’t know any bank that runs them globally on one machine to compensate for time zones. Batches happen at a fixed time, are idle most of the day. Sure you can pay MIPS out of the ass, but you’re much more cost effective paying more for peak and idling the rets of the day.

    My experience are banks (including UK) that are modernizing, and cloud for most apps brings brutal savings if done right, or moderate savings if getting better HA/RTO.

    Of course if you migrate to the cloud because the cto said so, and you lift and shift your 64 core monstrosity that does 3M operations a day, you’re going to 3nd up more expensive. But that should have been a lambda function that would cost 5 bucks a day tops. That however requires effort, which most people avoid and complain later.


  • Redundancy should be automatic. Raid5 for instance.

    Plus cloud abstracts a lot of complexity. You can have an oracle (or postgres, or mongo) DB with multi region redundancy, encryption and backups with a click. Much, much simpler for a sysadmin (or an architect) than setting the simplest mysql on a VM. Unless you’re in the business of configuring databases, your developers should focus on writing insurance risk code, or telco optimization, or whatever brings money. Same with k8s, same with Kafka, same with cdn, same with kms, same with iam, same with object storage, same with logging and monitoring…

    You can build a redundant system in a day like Legos, much better security and higher availability (hell, higher SLAs even) than anything a team of 5 can build in a week self-manging everything.


  • Agree to disagree. Banking, telecommunications, insurance, automotive, retail are all industries where I have seen wild load fluctuations. The only applications where I have seen constant load are simulations: weather, oil&gas, scientific. That’s where it makes sense to deploy your own hardware. For all else, server less or elastic provisioning makes economic sense.

    Edit to answer the last question: to test variable loads, in the last one. Imagine a hurricane comes around and they have to recalculate a bunch of risk components. But can be as simple as running CI/CD tests.