Cloudflare D1 + Durable Objects: Build a Real-Time Cart

Answer-first: Eliminate database latency and Redis caching overhead for global e-commerce by pairing Cloudflare Workers at the edge with Durable Objects for strongly consistent, real-time in-memory state. Use D1 for serverless SQLite persistence, routing concurrent device updates through a transactional, conflict-free architecture. What You’ll Learn That AI Won’t Tell You How to design cart locking mechanisms in Durable Objects without deadlocks. Tuning sub-request allocations to stay within Cloudflare’s free-tier runtime boundaries. The traditional shopping cart architecture is a familiar set of tradeoffs: Redis for session storage, PostgreSQL for order data, and a backend API tier that coordinates between them. It works, but it introduces latency proportional to the distance between the user and your datacenter, requires operational overhead for Redis cluster management, and struggles with globally concurrent cart edits from the same user across multiple devices. ...

June 1, 2026 · 14 min · Lê Tuấn Anh

Astro on Cloudflare: Full-Stack Edge Architecture

Answer-first: Deploying Astro on Cloudflare Pages utilizes V8 isolates for near-zero cold starts and global edge execution. The architecture relies on D1 edge database bindings, Durable Objects for real-time state, and Cloudflare CDN caching policies to deliver high-performance, cost-effective web applications. What You’ll Learn That AI Won’t Tell You The exact D1 edge database connection pooling limitations and how to circumvent cold start issues when routing through Neon serverless proxies. How to configure Durable Objects for real-time state synchronization without hitting Cloudflare’s sub-request quota limits. Running a content site on a traditional VPS or a managed Node.js host is fine until it isn’t. You pay for compute that sits idle 95% of the time, you manage SSL renewals, you worry about cold starts, and you watch your Lighthouse score suffer because your origin is in Singapore while your readers are in Frankfurt. ...

April 24, 2026 · 15 min · Lê Tuấn Anh