How Meta built the infrastructure for Threads

What this post added

This post details how Meta leveraged its existing, mature infrastructure, specifically ZippyDB and Async, to support the rapid launch and unprecedented growth of Threads. It highlights ZippyDB's multi-tenancy, common hardware pool, and resharding protocol for scaling keyspaces with zero downtime, and Async's serverless function platform for handling computationally expensive, non-blocking operations like social graph synchronization and notifications. The post emphasizes how these pre-existing, scalable systems enabled Threads to handle millions of users within days without requiring new infrastructure development specifically for the product.