Andrew's Blog

Redis in Production: Why a Fast Cache Can Still Return Stale Data

Sat, 10 Oct 2026 00:00:00 +0000

Cache races, stampedes, Redis-backed rate limits, and eight less obvious failures explained with diagrams and runnable Python.

Redis Persistence Explained: What RDB and AOF Actually Save

Thu, 08 Oct 2026 00:00:00 +0000

Follow a Redis write from memory to disk and learn how RDB snapshots, AOF, rewrite, and recovery behave after a failure.

Learning Redis from the Ground Up: Keys, Data Types, and the Decisions That Matter

Sat, 03 Oct 2026 00:00:00 +0000

A practical Redis guide built around an online event app, from keys and TTLs to concurrency, Cluster, and production tradeoffs.

Understanding OOMKill in Kubernetes

Wed, 02 Sep 2026 00:00:00 +0000

Understanding Linux OOM Killer and Kubernetes memory limits.

About

Mon, 01 Jan 0001 00:00:00 +0000

Hi, I’m Andrew Nguyen 👋

I’m curious about cloud engineering, DevOps, and the infrastructure that keeps everything running. I like figuring out how things work, especially when they don’t work the first time.

Around here, I share notes and practical lessons on:

AWS
Kubernetes
Linux
Terraform
Docker
CI/CD
System Design

I started this blog because the best lessons often begin with “Why is this broken?” and end with far too many open browser tabs. Writing helps me remember the answer; sharing it might save you a few tabs (and a little coffee).