Cloudflare says smaller hash rings reclaimed more than 100TB of RAM
Four engineers cut each entry from 8 bytes to 6 and reduced virtual hashes about 90%, then deployed the change without invalidating cached content across the network.
By Ryan Merket · Published
Primary source: The Cloudflare Blog
Why it matters
Cloudflare's claimed 100TB gain shows how mature infrastructure companies can create meaningful capacity by revisiting old defaults instead of buying more hardware.
Cloudflare engineers Kevin Guthrie, Mariia Iurchenko, Zaidoon Abd Al Hadi and Ivan Babrou say they reclaimed more than 100TB of RAM across Cloudflare's network by shrinking a consistent-hashing data structure and generating about 90% fewer virtual hashes per server.…
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