Cluster-A 🌐 in cloud (Hetzner control plane) + workers across 3+ home sites 🏡🏚🏠 over VPN 🌐 High-Level Architecture ✅ Core Principles Feature Design Cluster-A Distributed across sites via VPN Cluster-B Local to main home Networking Tailscale or WireGuard DNS Joker.com Dynamic DNS DB CNPG primary @ home + async replicas at other sites Storage …
This article explains how to configure a high-performance Linux development workstation running Debian 13 (Trixie) or Debian 12 (Bookworm). 📑 Table of Contents 🧩 Introduction This guide prepares a workstation optimized for local development, build pipelines, and database workloads on fast NVMe storage. It focuses on reproducibility, speed, and maintainability. 🖧 Hardware & Network 🖧 …
Root cause: Mediatek MT7921E Wi-Fi driver preventing suspend Overview Some Linux systems equipped with Mediatek MT7921/MT7922 Wi-Fi + Bluetooth cards fail to remain suspended.When you attempt systemctl suspend, the machine briefly enters sleep and then instantly wakes back up. Typical kernel logs show: The mt7921e driver is known to hang during suspend, causing an “early …
🖥️ Dual-GPU LLM Workstation Build Spec Target use case: Repo-aware coding assistant (30–34B models, fine-tuning, RAG) on local hardware. 1. Core Components 🔹 Motherboard MSI MEG X670E ACE (Recommended) 🔹 GPUs 2× NVIDIA GeForce RTX 5070 Ti 16 GB 🔹 CPU AMD Ryzen 9 7950X / 9950X 🔹 Memory 128 GB DDR5 (2×64 GB) 🔹 …
1. Origins (1980s) At the time, this was pioneering: most office automation was paper-based or tied into mainframes; Workhorse brought structured workflow to UNIX servers with graphical clients. 2. AT&T Rhapsody (Early 1990s) The AT&T Rhapsody launch was significant because it pushed workflow into the mainstream “groupware” discussion of the early 1990s. 3. Acquisition by …
Below is a single document that contains: Part A — Source (Restricted Pascal) Part B — Generated BASIC (Bascom-compatible, stacks for params/returns, minimal line numbers) Calling convention: Notes
(from first prompt to full parameter-stack model) Prompt 1 User: write a C++ program that parses a basic program and replaces all occurrences if {} wrapped names with a line number Assistant: Structured BASIC Generated BASIC Prompt 2 User: the input should not have line numbersyes, and maybe we can just have labels without the …
I asked ChatGPT to convert a PHP program to Go, then to Pascal and then to a customised dialect of Basic, it did a pretty good job at Go and Pascal, but what surprised me was how it managed to do the customed Basic dialect pretty good too, it’s not perfect, there is no PostgreSQL …
🧩 TL;DR: A subtle expireAfterAccess bug in a dual-cache setup caused thousands of evictions in a small cache — even for reused keys. The root cause? Only one side of the bidirectional cache was touched on read, leading to silent expiry in the reverse map. This engineering postmortem breaks down how different experience levels (from …
📘 @PolicyScope Annotation System This document explains how to define, use, and enforce repeatable @PolicyScope annotations in a Spring Boot application using Aspect-Oriented Programming (AOP). 🧩 Purpose @PolicyScope is a repeatable annotation used to declare one or more logical access scopes on a method. These scopes can be inspected at runtime to enforce access control …