The percentage of time a service operates normally within a given time period.
Uptime is the ratio of service runtime to total measurement time — typically one calendar month.
Conversion to real time for one month: 99.5% corresponds to approximately 3 hours 39 minutes of downtime; 99.8% approximately 1 hour 27 minutes; 99.9% approximately 43 minutes; 99.95% approximately 22 minutes; 99.99% approximately 5 minutes.
When reading the commitment, note three things beyond the number: whether the measurement period is monthly or annual, which cases are excluded from the calculation, and how to request compensation if the target is not met.
