Database Uptime vs. Aircraft Engine Maintenance

Brent Ozar has a great way to compare maintaining databases to maintaining aircraft engines. It goes like this:

"...if you have an airplane, it’s absolutely imperative that its engines not fail mid-flight. In order to accomplish that, you have to have regular downtime for mechanics to examine and replace parts – and that doesn’t happen up in the air. 

With Availability Groups, we’re lucky enough to be able to transfer our passengers databases from one airplane to another quickly – but we still have to have those other airplanes getting constant examinations and patches from mechanics." (Brent Ozar, December 7, 2016)

You can read the full posting at:  Availability Groups: More Planned Downtime for Less Unplanned Downtime