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World's Fair 2025

Dream Machine: Scaling to 1m users in 4 days — Keegan McCallum, Luma AI

Keegan McCallum , Luma AI

Overview

This talk details Luma AI's experience scaling their Dream Machine video generation model to one million users in four days. It covers the immense infrastructure challenges faced during the launch, including the need to rapidly scale GPU resources from an initial 500 H100s to 5,000. The presentation also discusses the evolution of their serving stack from a brittle, coupled system to a more robust, decoupled architecture built on PyTorch, and the strategies implemented for fair job scheduling and efficient model management.

Who should watch

Key takeaways

Notable quotes

*We were woefully unprepared for what came next.*
*The KEK W emoji, which has become a cultural staple of Luma over over time, and it was very much the mood at the time.*
*It's the least enjoyable part of working at Luma is managing these cues.*

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Unofficial community note. Prefer the recording for nuance.