Explore techniques for scaling Rails API to handle write-heavy traffic in this 56-minute conference talk. Learn how to serve millions of database transactions per minute with Rails, focusing on the use of multiple databases and sharding. Discover practical strategies derived from long-term experience, covering system architecture, coding guidelines, and database configuration. Delve into topics such as traffic offloading by replication, consistency management, and Rails code implementation. Examine case studies, pitfalls to avoid, and recommended practices for handling high-volume write operations in mobile game backends. Gain insights into past, present, and future approaches to scaling Rails APIs for optimal performance in write-intensive environments.