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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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