Networking

← Previous Chapter: Part 1: CAP, PACELC & Clean Architecture | Series Hub: System Design Masterclass | Next Chapter: Part 3: Caching Strategies, Redis/Valkey & Stampede Prevention → Prerequisite: Read Part 1: CAP, PACELC & Clean Architecture Primer to understand distributed trade-offs and composite availability foundations. Answer-first: Layer 4 load balancers route packets via eBPF and Direct Server Return to achieve sub-millisecond wire speed, while Layer 7 API gateways inspect HTTP headers and enforce token bucket rate limits. Combining kernel-bypass XDP packet filtering with Go reverse proxy buffer pools sustains 100,000 requests per second with sub-5ms P99 latency bounds across distributed clusters. ...

📖 Series Navigation: ← Previous Chapter: Part 9 — Cookie vs. SessionStorage vs. LocalStorage | Series Hub Part 10: Envoy Gateway vs. Cilium eBPF Service Mesh: Kernel Performance & Layer 7 Governance Showdown Answer-first: Envoy Gateway excels as a North-South Edge API Gateway with dedicated Envoy pods for advanced L7 policies (WAF, JWT, rate limiting, AI token quotas). Cilium eBPF dominates East-West cluster networking by bypassing the TCP/IP stack via sockops and cutting 92% RAM with node-level Envoy daemons. The 2026 standard combines both. ...

← Previous Chapter: Part 11: Security, Zero Trust & API Rate Limiting in Go | Series Hub: System Design Masterclass Prerequisite: Read Part 11: Security, Zero Trust & API Rate Limiting in Go to master mutual TLS encryption and perimeter protection before optimizing low-level socket performance and serialization throughput. Answer-first: High-performance microservice communication in Go requires matching transport protocols and serialization formats to specific latency and throughput constraints. While gRPC with Protocol Buffers v3 over HTTP/2 multiplexing delivers optimal low-latency east-west service mesh throughput, HTTP/3 QUIC eliminates transport-layer head-of-line blocking for public ingress, and WebSockets or Server-Sent Events sustain real-time bidirectional event streaming. ...