TLDR Tech / Data
Saving another 100TB of RAM with math (and Rust)
Consistent hashing smooths load by assigning each server many virtual points, but those points can become a major memory cost at global scale. Cloudflare reworked Pingora's hash-ring representation, sorting, and rollout path to reclaim more than 100 TB of RAM. The article connects the distribution math to a staged migration that contained cache churn and preserved rollback control.
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