Under the Hood, Off the Hot Path: How D1 Scales to Millions of Databases
Cloudflare, Tuesday, October 13th, 2026
Cloudflare details the D1 control plane changes that let its serverless SQLite database scale to millions of databases.
Cloudflare says AI-assisted development and vibe coding platforms are pushing applications toward many small databases, one per user, tenant or preview environment.
D1, Cloudflare's serverless database based on SQLite, lets customers create millions of databases and pay only for use.
The post is a deep dive into how Cloudflare scaled D1's control plane to support platforms with millions of databases, hundreds of thousands active at once, without routing every query through centralized bottlenecks.