Architecture: Mainframe

Your bank's ATM runs 24 hours a day. The transaction you just made at the counter was confirmed in under a second. The insurance claim filed this morning will be processed overnight alongside three million others. None of that happens on a Kubernetes cluster. It happens on a mainframe. For engineers who grew up on distributed systems, the mainframe is a foreign country. The vocabulary is different. The mental model is different. Even the pric… Read More