@dustinb3403 said in Does Regular maintenance count as Downtime?:
It's a question of what does 99.999% include.
That percentage is uptime, and specifically means that services are available 99.999% of the time... with no more than 5 minutes 15 seconds of downtime per year.
This is achieved through High Availability solutions. Such as in the example of websites, load balancing web servers with redundant reverse proxies, IPs, DNS, etc...
You can't have uptime like that if services are unavailable...
You do planned maintenance piece by piece so that you don't have to bring down your services. You would do firmware or OS updates on nodes 2, 4, and 6, while nodes 1, 3, and 5 are still running and providing services.