Cloudflare stops rebuilding 20-million-record DNS zones to change one setting
Engineer Alex Fattouche says a targeted planner and unified scheduler let Cloudflare skip full rebuilds on 92.95% of DNS builds over 24 hours.
By RuntimeWire Staff · Published · Updated
Primary source: The Cloudflare Blog
Why it matters
Cloudflare's result shows where large-platform performance gains now come from: classifying internal changes precisely enough to skip expensive work without serving stale DNS data. The reported 85% peak-memory cut and halved median build delay are internal pipeline measures, ending at the Quicksilver write, so operators should read them as capacity and tail-latency gains inside Cloudflare rather than a promised end-to-end propagation time for any single domain.
Cloudflare engineer Alex Fattouche says the DNS provider, founded by Matthew Prince, Michelle Zatlyn and Lee Holloway, has changed how its pipeline handles zone-setting updates. In 2022, he wrote about making individual record changes avoid full-zone rebuilds. In a Cloudflare Blog post published on November 2nd, Fattouche described finishing the harder half of that job: zone settings.…
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