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Cake day: August 24th, 2023

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  • Unless twitter had a test system doing millions of varying actions a second, I’m not sure a test environment would find those problems, or at least not quickly. Sometimes those services get added to help spread loads that you might not encounter otherwise.

    Tbh I’m not sure what level of automated testing these sites have, but I also wouldn’t be surprised if the services are tested in isolation at scale, but not against each other at scale, and that there’s some general understanding that the link between them at scale is okay if both individually are okay?

    Still absolutely terrible to do that to a live environment.