The Uptime Meter(SM) measures the actual availability of installed Stratus systems worldwide. This meter is re-calculated daily, based on actual reported service incidents.

Uptime Calculation

• Uptime of the Stratus ftServer family is computed and updated daily based on all reported service incidents for all ftServer systems worldwide, over the preceding 6-month period
• Both hardware-related and software-related incidents are included in this availability measurement
• Outages are only counted if there is an impact to production

Definition of Uptime

"Uptime" or "Availability" is defined here as the fraction of a time period that a system is fully operational; for example, if a system is fully operational 100 hours per week, its availability is 100/168 = 60%

Availability is normally expressed in 9's; for example, "five nines" means that a system is fully operational 99.999% of the time, corresponding to an average of less than 6 minutes downtime per year. The chart below shows what statistical impact various availability levels have on average downtime..

Disclaimer: The Uptime Meter is a measured indicator based on a statistically significant number of operational Stratus systems; however, the actual availability of any particular system may differ.