Technical Learnings

Ollama + Gemma 4 Local AI Setup Guide Install and run a local LLM on an external drive — step by step   Overview This guide walks you through installing Ollama and the Gemma 4 language model entirely on an external drive, so your main system drive stays clean. You will also learn how to expose the model via an API for use in tools like Postman or your own applications.   Topic Details Tool Ollama — a lightweight local LLM runner Model Gemma 4 by Google (~9 GB RAM required) Storage External drive (e.g. D:\ or F:\ OS Windows (PowerShell) API Port localhost:11434   Part 1 — Download Ollama Visit the official Ollama website to download the Windows installer.   •         Go to: https://ollama.com/download •         Download the OllamaSetup.exe file   ?...

  The “North–South” and “East–West” principle in coding is simply about understanding how data moves in and out of your system (North–South) versus how it flows internally between services (East–West). Think of it like traffic: cars entering/exiting a city vs. cars moving between neighborhoods inside the city. 🌐 Simple Explanation North–South Traffic Definition: Data crossing the boundary of your system. Examples: A user’s browser sending a request to your API. Your service calling an external payment gateway. Security Needs: Protect entry and exit points with HTTPS/TLS, firewalls, API gateways, and monitoring. East–West Traffic Definition: Data moving inside your system between microservices. Examples: Orders service talking to Payments service. Pods communicating inside Kubernetes. Security Needs: Encrypt internal calls (mTLS), use service meshes (Istio, Linkerd), and enforce “zero trust” (always verify, even internally). 🧭 Easy Compass Metaphor No...