How We Moved Discord Voice to the Edge
Summary
Discord migrated voice and video traffic to Cloudflare's edge network across 300+ PoPs to reduce latency and improve quality. The post covers the rationale, the phased Iceland and Rotterdam rollouts, the discovery and deployment architecture, and the technical challenges (NIC queue contention, UDP buffers, 25-second hangs, and European ping spikes) along with fixes and the plan moving forward.