ITNotes - Page 18 of 119 - From Terminal to Cloud

PostgreSQL Job Queue with SKIP LOCKED and Advisory Locks: Background Tasks Without Redis or RabbitMQ

July 20, 2026

Learn how to build a reliable background job queue using PostgreSQL's SKIP LOCKED and Advisory Locks — no Redis or RabbitMQ required. Covers worker implementation in Python, retry logic with exponential backoff, per-resource locking, and queue monitoring using plain SQL.

Build a Personal AI Knowledge Base with Obsidian, Ollama and ChromaDB: Offline Semantic Search for Your Notes

July 20, 2026

Keyword search fails when you need it most — 2 AM, 600 notes, and the answer is in there somewhere with a title you don't remember. This guide builds a fully offline personal AI knowledge base using Obsidian, Ollama, and ChromaDB so you can search your notes by meaning, not by exact wording, with no cloud dependency.

DevOps

Kube-green: Automatically Suspend Kubernetes Workloads After Hours to Cut Dev/Staging Cloud Costs

July 20, 2026

After watching a $847/month dev cluster bill for workloads idle 65% of the time, I set up kube-green — a Kubernetes operator that suspends Deployments and StatefulSets outside working hours. Six months later, monthly costs dropped to $290 with zero operational issues.

Programming

Mastering Zod in TypeScript: Schema Validation, Type Inference, and React Hook Form Integration

July 20, 2026

Zod fills the gap TypeScript can't close: runtime validation that stays in sync with your types automatically. This guide covers schema definition, type inference, React Hook Form integration, and sharing schemas across a full-stack TypeScript project.

Database

Stop Writing CRUD: Build a REST API Directly from PostgreSQL with PostgREST

July 20, 2026

Stop writing repetitive backend code. Learn how to use PostgREST to transform your PostgreSQL schema into a high-performance, secure REST API in minutes.

Deploying Flowise on Docker: Stop Coding Your AI Agents and Start Drawing Them

July 20, 2026

Ditch the 2 AM debugging sessions. Learn how to deploy Flowise on Docker to build complex AI agents and RAG workflows visually, cutting development time by up to 80%.

Programming

Why We Swapped Express for Fastify: A Six-Month Production Post-Mortem

July 20, 2026

Switching from Express to Fastify cut our latency by 30%. This production review covers the technical benefits of schema-first development and high-performance Node.js architecture.

Database

Mastering Database Replication Lag: Monitor, Diagnose, and Fix Sync Delays in PostgreSQL and MySQL

July 19, 2026

Database replication lag can silently corrupt your users' experience — orders appearing unpaid, inventory showing wrong counts. This guide covers how to monitor replication lag in PostgreSQL and MySQL, diagnose the root cause across network, disk, and query layers, and apply targeted fixes including parallel replication and WAL tuning.

Networking

Python Network Traffic Analysis with PyShark: Automated Anomaly Detection and Reporting

July 19, 2026

PyShark lets you capture and analyze network packets programmatically in Python — aggregating connection counts, detecting anomalies, and generating traffic reports automatically. This tutorial walks through building a real traffic analyzer, from live capture to post-incident pcap analysis, that replaces manual Wireshark filtering during production incidents.

Database

Sub-Second Analytics at Scale: A Hands-on Guide to Apache Druid

July 19, 2026

Build a high-performance real-time analytics system with Apache Druid. This guide covers everything from local setup and Kafka streaming to advanced OLAP tuning for sub-second queries.

Speed Up Python with Numba JIT: Make Heavy Data Processing 100x Faster

CDK for Terraform (CDKTF) with Python: Deploy Cloud Resources Without Writing HCL

Clean Up Your Java Code: A Practical Guide to Vavr

Stop Deploying Broken Docker Images: A Guide to Container Structure Tests

Mastering Golang Memory Profiling: A Practical Guide with pprof

Stop Storing Secrets in Git: A Guide to 1Password Connect on Kubernetes

Building a Network Performance Testbed: High-Speed Testing with TRex on Linux

Stop Writing Boilerplate: A Guide to Python Dataclasses, Attrs, and Pydantic

Build Your Own Private 5G Network: A Hands-On Guide with Open5GS and srsRAN

Mastering Socket.IO in Node.js: Building Secure, Production-Ready Real-Time Apps

PostgreSQL Job Queue with SKIP LOCKED and Advisory Locks: Background Tasks Without Redis or RabbitMQ

Build a Personal AI Knowledge Base with Obsidian, Ollama and ChromaDB: Offline Semantic Search for Your Notes

Mastering Zod in TypeScript: Schema Validation, Type Inference, and React Hook Form Integration

Stop Writing CRUD: Build a REST API Directly from PostgreSQL with PostgREST

Deploying Flowise on Docker: Stop Coding Your AI Agents and Start Drawing Them

Why We Swapped Express for Fastify: A Six-Month Production Post-Mortem

Mastering Database Replication Lag: Monitor, Diagnose, and Fix Sync Delays in PostgreSQL and MySQL

Python Network Traffic Analysis with PyShark: Automated Anomaly Detection and Reporting

Sub-Second Analytics at Scale: A Hands-on Guide to Apache Druid