Data center SLA uptime indicates the amount of time a server remains up and running, usually over the course of a year. Uptime is expressed as a percentage. So if a facility’s SLA claims to provide 99% uptime, then customers can expect its servers to be down 1% of the time, or 3.65 days over the course of a year.

How is SLA calculated for uptime?

So, how do you calculate the uptime percentage? The way we calculate uptime is easy to understand: we take the number of seconds that your monitor was down (in a certain time frame), and divide this by the total number of seconds your monitor was being monitored during that time frame.

What does 99.9% SLA mean?

About the SLA Uptime Calculator Uptime is generally the most important metric for a website, online service or web based provider and is expressed as a percentage such as ‘99.9%’. For example a 99.9% uptime equates to 43 minutes and 50 seconds of downtime.