Open source Durable Objects for Postgres
Summary
This post introduces Open Source Durable Objects for Postgres, a library that implements the Durable Objects model inside relational databases like SQLite, PostgreSQL, and MySQL. It argues for avoiding lock-in, performance costs, and external daemons by moving state and scheduling into the database, and provides a practical example of an actor-based ticket sale with mailbox-based concurrency. The article also compares this approach to Cloudflare's Durable Objects and Shopify's inventory reservations, and includes installation notes for Node and Rails as well as benchmarks.