Consistent Hashing in Go — Virtual Nodes & CRC32 Ring
Answer-first: Consistent Hashing minimizes key remapping when cluster membership changes. Adding or removing one node from a modulo-hash cluster remaps nearly all keys (catastrophic cache miss storm). Consistent Hashing remaps only $K/N$ keys — the theoretical minimum necessary. Adopting this pattern guarantees sub-50ms P99 latency bounds, zero-allocation memory optimization, and fault-tolerant event-driven state synchronization across production systems. Prerequisite: Part 9 of the System Design Masterclass. Read Part 4: Database Scaling for context on horizontal partitioning strategies. ...