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Running IBM Informix in Docker and Connecting webMethods JDBC Adapter Overview This article documents, end‑to‑end, the setup of IBM Informix Developer Edition running in a Docker container and its successful integration with Software AG webMethods Integration Server using the JDBC Adapter. The goal is to provide a practical, real‑world guide covering: Informix installation via Docker Linux host preparation and security pitfalls Network and port exposure JDBC driver selection and placement webMethods JDBC Adapter configuration Common errors and how they were resolved This guide is based on a real troubleshooting session and reflects the issues you are most likely to encounter in enterprise Linux environments. ...

Why Open Source and Open Standards Matter More Than Ever In today’s digital world, it’s easy to take technology for granted. From sending a message to processing a payment or streaming a video, everything just works. But behind the scenes, much of this seamless experience is powered by two foundational pillars: open source software and open standards. Without them, modern life as we know it simply wouldn’t function. The Invisible Backbone of Modern Technology Everyday activities — banking, healthcare, communication, transportation — rely heavily on technologies built using open source and open standards. ...

Quantum Computing: The Next Technological Leap for Business and Government Quantum computing is no longer just a theoretical concept. It is rapidly evolving into one of the most potentially disruptive technologies of this century. For technical leaders and strategic decision-makers, understanding its impact is no longer optional — it is essential. Why Quantum Computing Matters Classical computers have powered decades of innovation, but they are beginning to reach physical and computational limits. Highly complex problems — such as molecular simulation, logistics optimisation, and financial modelling — can become impractical or impossible to solve with current digital systems. ...

Quantum Computing: Beyond Classical Limits Introduction For over half a century, computing has evolved through incremental improvements—faster CPUs, more memory, and better architectures. This evolution, largely driven by semiconductor technology, has powered everything from personal computers to cloud infrastructure. However, quantum computing represents something entirely different. It is not simply a faster version of today’s machines. Instead, it introduces a fundamentally new model of computation based on the principles of quantum mechanics. This shift has the potential to solve problems that are currently infeasible—even for the most powerful supercomputers. ...

CKAD Certification Journey — Part 5: Services & Networking (Where Kubernetes Becomes a Distributed System) Up until now, everything we’ve discussed — Pods, Deployments, Config, Observability — happens inside isolated units. But real systems are not isolated. They communicate. And the moment you introduce communication, you introduce: instability coupling failure propagation latency security risks This is where Kubernetes networking stops being “just configuration” and becomes system design. 🧠 The Fundamental Problem: Pods Are Ephemeral Every Pod in Kubernetes gets its own IP. ...

CKAD Certification Journey — Part 4: Application Environment, Configuration & Security (Where Control Meets Responsibility) By the time you reach this stage, you already know how to: build applications deploy them observe them But here is where things become real engineering: 👉 How you configure and secure your applications determines whether your system is stable, multi-tenant, and safe — or fragile and dangerous. This is not just about features like ConfigMaps or Secrets. This is about understanding how Kubernetes enforces boundaries and behaviour. ...

CKAD Certification Journey — Part 3: Application Observability & Maintenance (The Reality of Running Systems) If deployment is where you introduce change, observability is where you survive that change. And here is the uncomfortable truth: Most engineers don’t fail at Kubernetes because they don’t know how to deploy — they fail because they don’t know how to understand what’s happening after deployment. This article is not a list of tools. It is a practical mental model for diagnosing real systems under pressure. ...

CKAD Certification Journey — Part 2: Application Deployment If Part 1 was about building applications correctly, this part is about something far more dangerous: 👉 Deploying them without breaking production Because here’s the uncomfortable truth: Most Kubernetes outages are not caused by Kubernetes itself — they are caused by how applications are deployed, updated, and scaled. This article is not a glossary. It’s a mental model + practical guide to how deployment actually works in real systems. ...

What Really Happens on a Kubernetes Node (Deep Dive): OverlayFS, containerd, Volumes, and the Hidden Mechanics Most Kubernetes explanations stop at Pods and containers. But the real story — the one that actually helps you debug, optimise, and reason about failures — happens inside the node. This article goes beyond the basics and explains: OverlayFS (and why it matters in real scenarios) containerd internals (beyond “it runs containers”) Image storage and caching Writable layers and their limitations Volume mounting mechanics (bind mounts) The kubelet’s role in orchestrating everything Linux primitives: namespaces & cgroups Where performance and problems actually come from 🧠 The Real Execution Flow When you create a Pod, Kubernetes does NOT “run a container”. ...

CKAD Certification Journey — Part 1: Application Design & Build Achieving the Certified Kubernetes Application Developer (CKAD) certification has been a rewarding milestone in my journey as a developer. This blog series is structured into five parts, each covering a key domain of the CKAD curriculum: Application Design & Build (this article) Application Deployment Application Observability & Maintenance Application Environment, Configuration & Security Services & Networking This first part focuses on the foundations of building applications for Kubernetes — understanding containers, how they are built and distributed, and how Kubernetes runs them efficiently. ...