Last post, we hand-rolled Flannel in Kind cluster and witnessed the 50-byte per-packet VXLAN encapsulation overhead via tcpdump. This time, we replace Flannel with Cilium, leveraging eBPF to completely eliminate this “network tax”, and use Hubble for traffic visualization.

This weekend, I built a “networkless” cluster from scratch on Manjaro using kind, manually debugged missing kernel modules and CNI plugins, and finally witnessed the VXLAN encapsulation process with tcpdump. This post documents the entire journey.

K8s Controllers and Temporal are both “control plane” technologies, but they represent fundamentally different design philosophies. This post deep-dives into their core differences and explores how to combine them in AI Infra platforms.

While building a trading system backend, I used Temporal to solve the classic distributed transaction consistency problem. This post breaks down Temporal’s core mechanisms and explores its applications in AI task scheduling.

A seemingly simple concurrent Map access, performance crashes under high concurrency. pprof shows 90% of time spent in sync.Mutex.Lock. This post documents the investigation and performance comparison of different lock strategies.

A key user experience metric for NAS products: how long from pressing power to accessing shared folders? Our target was 30 seconds, but the original took 75 seconds. This post documents the complete journey from 75s to 30s.