Last week I talked with my co-worker Fouad Hamdi about a mainframe modernization project he worked on last year. I mean, the team he was on of course, not him single handedly. He wrote a great over of the process and I was eager to ask him a few questions. The video included in this episode is an except about finding the complete end-to-end application, rather, process that you’re modernizing.
Finding the whole system: from software to meatware
When you’re modernizing a software-driven system, one of the main obstacles is just knowing what you’re modernizing, finding all the software and services you depend on. Larger, more important (“mission critical”) software often relies on other systems and services too. An insurance application relies on another system to look up customer information and check regulations in different countries. A retail application needs to call out to a different application check inventory. And so on!
Each of these interactions is a dependency and couples the application together. Programmers despise dependencies and coupling: it slows them down and requires them to not only know about those other systems, but test out if changes create bugs in systems you depend on and vice-versa. Programming styles like microservices are, more or less, built to avoid and minimize this kind of dependency and coupling.
So, when you’re modernizing an application it’s critical to find all those systems and how they interact with each other. Finding the software components is hard enough, especially for a 30 year old application like Fouad worked on. There’s two more things that make it even more difficult: (1) finding the processes and flow that the software is supporting, and, (2) finding all of the human interactions that it takes to run that flow, trouble shoot it, and modify it.
One of the processes that Fouad describes is event storming and the way Tanzu Labs does it is designed to find all of the software components, but also the meatware components, the hand-offs, and all those arrows between the boxes in a diagram.
Check out the video above for an excerpt going over all this. If you’re working on an app modernization project, especially a mainframe one, check out the entire interview here:
And, if you’re interested in more, Marc Zottner and I cover these concepts and the bigger toolbox of modernizing applications in our book Escaping the Legacy Trap. It’s a free download, well, “free as in type in your email address,” but, you know, free download.
Wastebook
“I’ve been poking around this device for days, trying to make it do something new that I haven’t seen before.” Here.
“harvested a few celebrities” Here.
“I’ve got an account on Bluesky now but, god, can we really be bothered?” - w/e 2023–04–30
Relevant to yours interests
How to be resilient - ‘notice and name your emotions. Identify them and see them as “other”. Not you. Also, if it helps, focus on your body. This reminds you what is real, unlike those thoughts in your head which are telling you the world is ending. The thoughts aren’t real; your body is.’
Danielle Steel and the Tragic Appeal of Overwork - Cal Newport - Getting stuck in a workaholic loop of success: ’For a notable subset of talented individuals burnout is less about their exploitation by others than it is their uneasy dialogue with themselves.’
Event Strategy: The Guide for 2023 and Beyond - An extensive handbook for doing (marketing) events.
Also, see Hinada’s suggestions for off-site events.
Why You Should Eat More Bread (And How to Do It Right) - Anchovy and butter seems fun.
Be Kind, and Be Happier - 🤖 People often fail to be kind due to negative experiences with others. This can start a negative cycle where unkindness leads to unhappiness, and vice versa.
Next week I’m speaking at Devoxx UK, in London. I’m giving a talk about platform engineering on Thursday, May 11th at 10am. I’ll be there most of Wednesday and Thursday - it’d be great to say hello if you’re around. Also, the Devoxx conferences are really good conferences, if you’re in the area and do anything with software, you should come check it out.
Logoff
Spring is bringing more and more warm days to Amsterdam, finally. I got out the comfy terrace chairs. I’d forgotten they recline.
See y’all next time!
From software to meatware