How Meta built the infrastructure for Threads

This post details how Meta's existing infrastructure, specifically ZippyDB and Async, was leveraged to support the rapid launch and growth of the Threads application. It highlights ZippyDB's features for scaling keyspaces, including its capacity management framework, multi-tenancy, and resharding protocol, which enabled Threads to scale by 100x with zero downtime. It also explains Async's role as a serverless function platform in handling computationally expensive operations like user onboarding and follow requests, managing massive job volumes and rate limits automatically to avoid overloading downstream services. The post emphasizes the importance of a decade of infrastructure development and a 'move-fast' engineering culture in enabling such rapid product launches and scaling.