I’d rather deploy on a Sunday

Originally posted on LinkedIn, but also saved here in hopes of longer posterity:

When you deploy you change the behavior of the system. You wouldn’t be deploying if you didn’t want to change it in the first place.

I don’t deploy on Fridays, not because I’m afraid of the technical implications -we know for years how to manage these- of a deployment gone wrong, but of the business implications and outsider systems dependencies that operate in degraded mode during the weekend. It is not whether the Ops or Dev on call can handle the things. It is whether the other side can and the faith you have they can. Or that you (or they) have a business person on call.

I’d rather deploy on a Sunday