What millions of requests per second reveal about not separating hot and cold data — and why downtime costs real money

https://www.slideserve.com/botwingtdn/craft-pinterest-pins-fast-a-practical-7-step-list-for-designers-who-need-accura

1) Why this list matters: the hidden cost of treating every bit the same Have you ever assumed "one storage fits all" because it looked simpler on paper? At low scale, that tradeoff can feel fine