This page may contain stale information. Last updated: 2026-09-19
Definition
Consistent hashing distributes requests across servers with minimal remapping when nodes change — core to CDN/backend routing at scale.
Key Points
- pingora-ketama optimization: single hash ~99% workload CV; 160 hashes ~8% CV — proving over-provisioning wastes RAM (2026-09-18-cloudflare-100tb-ram-optimization)
- Cloudflare cumulative ~200TB RAM saved including prior DNS team work