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Shopify posted a blog on tips to for scalable payment system, one tip peeked my interest related to switching from UUID to ULID. I explore the reasoning behind this in this video.


https://shopify.engineering/building-resilient-payment-systems


0:00 Intro


1:30 idempotency


6:30 UUID vs ULID


9:50 Clustered Index


13:30 Why UUID4 Inserts are slow


17:15 How ULID helps Shopify


22:00 Problem with tail pages


25:00 Does ULID help in all cases?


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