Five Nines Uptime: What 99.999% Really Costs
Five nines means 99.999% availability, about 5 minutes 15 seconds of downtime a year, and a budget smaller than most checks can resolve.
#uptime
8 posts tagged "Uptime".
Downtime: What It Means and How to Measure It
Downtime is any period a system is unavailable, but the percentage only means something once you state where you measured from and what counted.