Designing for High Availability: Active-Active vs Active-Passive LB clusters.

Senior load balancing is about distributed systems architecture. It's not just about 'splitting traffic'; it's about global availability, extreme low-latency, and multi-layered security.

Modern senior architects favor 'Cloud Native' patterns. We look at Anycast for global entry points, followed by L4 Maglev-style hashing for packet distribution, and L7 Envoy-based sidecars for fine-grained service mesh control. We utilize eBPF to bypass the traditional Linux networking stack (iptables) to achieve millions of packets per second on commodity hardware.