Deep dive on KeyDB's architecture using Claude Code and finally understand why SO_REUSEPORT is a game-changer for high-performance servers.
Traditional Accept - ONE thread calls accept() and distributes connections. This creates a massive bottleneck under load.
SO_REUSEPORT - Linux kernel becomes your load balancer, using connection tuple hashing to distribute directly to worker threads.
✅ Zero coordination overhead - no locks, queues, or inter-thread communication
✅ Perfect cache locality - accepting thread processes the entire connection
✅ Linear scalability - add cores, get proportional performance gains
Systems that previously choked at 10K connections/sec now handle 100K effortlessly.
#programmingwisdom #linux