Advanced guides
Rails: Advanced Guides
Advanced Rails on Fly.io: LiteFS, multiple Fly apps from one project, Phusion Passenger, multi-region deploys, AnyCable, the Machines API, and SQLite3.
As your Rails application becomes more popular, it will inevitably grow in complexity, the number of people using it will increase, and pretty much everything else goes up and to the right. Fortunately Fly can reduce some of that complexity by making global deployments easy and provide some best practices for scaling a Rails application on Fly.