Fly.io pulled off a neat trick, replicating SQLite globally in under a second! They dumped HashiCorp's Consul because it couldn't keep up with their massive node count and built their own Rust-powered engine, Corrosion.
This clever system uses CRDTs and a gossip protocol to keep everything in sync without relying on a central leader, making their distributed network super resilient and quick – quite the feat for scaling big systems!
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