Cloudflare details how D1 scaled its control plane to millions of databases, 15x growth in a year
bibryam · x · 2026-11-01
Cloudflare's engineering blog gives a behind-the-scenes look at scaling D1, its SQLite-based serverless database.
- Live non-deleted databases grew 15x in one year and 65x over two years; daily active databases grew 18x YoY (as of Oct 8, 2026).
- The driver: AI-assisted development and vibe coding flip the traditional model toward many small databases — one per user, app, preview environment, or tenant.
- Architecture: control plane split from data plane — Edge API Workers handle CRUD (via Hyperdrive to a Postgres primary + replicas/cache) and query endpoints (via Workers KV and an Eyeball Worker routing to D1 Durable Objects), avoiding centralized bottlenecks.
- The architectural patterns are reusable for anyone building control planes on or beyond Cloudflare's platform.
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