Craig Pardey

In my recent post about CI/CD performance, I mentioned that I’d built a shadow pipeline in Ansible to deploy to our on-prem dev environment. Since then, I have been campaigning to use those Ansible playbooks for our pre-Prod and Prod deployments too.

I secured approvals to do a proof-of-concept deployment to pre-Prod using the Ansible playbooks but it failed dismally because our pre-Prod VMs have drastically different sudo restrictions than our dev env. I do not have access to the pre-Prod VMs so I was not aware of these differences.

My current client has an enterprise CI/CD pipeline that is maintained by a centralized team that does not use it. Its product owner(s) do not rely on its output for their revenue. They are not measured on its performance or reliability.

And yet we are obligated to use this pipeline. There’s no other option. We were also handed a microservices architecture from the Architecture team so our application is comprised of about 20 separate services, each with their own deployment pipeline, thereby magifying our sensitivity to the whims of the enterprise CI/CD pipeline.

Payments Canada published an opinion piece outlining how they think ISO fits into the payments ecosystem.

The ISO 20022 standard provides a common language for Financial Institutions to use when communicating with each other. It brings consistency and well-considered data structures to interfaces that previously had none.

ISO 20022 defines a catalog of messages to standardize data exchange in the finance industry, and it is gaining popularity in Payments.

Here in Canada, Interac updated their APIs to support ISO 20022 several years ago. FedWire in the US will be rolling out ISO 20022 support in summer 2025, and Zelle is following suit with its integration to The Clearing House’s Real-Time Payments network.

But it’s not a standard despite what the name implies.

I wrote about DRY configs many years ago but astonishingly my clients don’t seem to read my blog. I mean, who even has a blog these days anyway?

Externalized application configs have a way of multiplying like rabbits to the point where people become afraid to touch them at all, let alone apply the DRY principle to them. The proliferation of poorly-designed configuration files in Enterprise Java systems is appalling, and the situation is compounded when an external configuration system like Consul or Spring Cloud Config is added to the mix.

I recently had to return an item that I’d bought online. It’s free to return the item in-person to one of their retail locations, or $10 to ship it back. There was a store nearby so I elected to do an in-person return but the experience shows what can happen when software and processes are developed without involving the user.

The store clerk was friendly and helpful. He asked for my online order number, found it in the system, and told me that the money would be refunded to the original form of payment used for the purchase - in this case, PayPal. Everything is going smoothly to this point.

Only by increasing flow through the constraint can overall throughput be increased – Eliyahu M. Goldratt, The Goal, 1984

Turning this around we get the corollory that optimizations made to areas other than the constraint only serve to worsen the constraint.

Agile practices, and particularly Scrum and SAFe, have been widely adopted in large enterprises over the last decade or so, spawning entirely new departments dedicated to locking down the process. Agile Centers of Excellence (CoEs) produce materials explicitly describing every aspect of their company’s specific flavour of Agile, and have coaches dedicated to enforcing it across the teams.

Plans are worthless, but planning is everything – Dwight D. Eisenhower

The value of a process is primarily derived from the process itself, not the output.

Producing a slide deck or document on a topic requires hours of thought, multiple drafts and revisions, wordsmithing, and lots of research.

This iterative process helps to clarify your thinking around a topic. The hours spent thinking deeply about a problem and continuously refining your arguments is where the real value lies, not in the artifact that results from that process.

If your sign needs a sign explaining the sign then it’s a poorly-designed sign.

Let me present a few examples. I’ll start with the intersection at Bloor and Parkside in Toronto shown below.

There are four lights in this image: one for the through traffic, one for the cyclists, and two for the right-turn traffic. Both the bicycle signal and the right-turn signal have additional signs adjacent to them explaining what those lights are for. The placement of these explanatory signs is inconsistent: two are to the right of the signal, one is to its left.

Non-Functional Requirements (NFRs) are used extensively in enterprise software to define things like performance requirements and availability expectations but it’s important to be specific about what we’re asking for.

I spend a lot of time with my clients helping them understand why the details matter for NFRs so let’s walk through an example to demonstrate what I’m talking about.

Let’s assume we’re dealing with a system that is going to process 3-5 million transactions per day with peak volume during business hours at around 50 transactions per second. A sample NFR for such a system might be stated as: