Cloudflare Shows Why Cache Layout Still Matters

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Source post: https://blogs.a2techify.com/2026/08/28/cloudflare-dns-cache-memory-layout/ LinkedIn URL: TODO after publishing

Intro

Cloudflare’s 1.1.1.1 DNS cache work is a practical reminder that high-cardinality systems need memory layout reviews, not just bigger machines.

Cloudflare says Big Pineapple, the platform behind 1.1.1.1, Gateway DNS, DNS Firewall, AS112, and other DNS services, stores more than 250 billion DNS cache entries at any time.
Most teams will never operate a DNS resolver at Cloudflare scale. But many teams are building systems with the same high-cardinality shape.
Cloudflare’s examples are Rust-specific, but the thinking is language-independent.
Every serious agent platform is accumulating traces, messages, tool calls, embeddings, safety annotations, file references, and retry metadata.

Read the full note: https://blogs.a2techify.com/2026/08/28/cloudflare-dns-cache-memory-layout/

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Topics: cloudflare, infrastructure, security