I am a mainframe capacity planner and performance analyst who drifted into that as a full-time job as opposed to it being one of many hats I wore as a small shop systems programmer. I have been a systems programmer since 1984, when my first PC (Personal, not Portable, Computer) was an IBM 4341 mainframe. While I have concentrated on z/OS, I started in VSE (now zVSE), VM (now zVM) and OS/VS1 (one of the predecessors to MVS). I have presented at conferences over the years on various systems, capacity and performance topics and enjoy all things mainframe. I like to remind people that the answer to any question you don't ask is always "No." That means I like to question things and provide a few answers when I can.
Email: jim.s.horne@lowes.com