Uptime Percentage: Why Your Check Interval Caps It
An uptime percentage is a sample, not a recording, and its precision is bounded by your check interval. Here is the arithmetic and why two tools disagree.
#sla
4 posts tagged "Sla".
RTO vs RPO: Two Clocks, and How to Set Both
RTO vs RPO compares two clocks from one failure: time offline and work lost. Set them per workload, and buy down the detection term first.
SLA vs SLO vs SLI: Which One You Have to Build
SLA vs SLO comes down to audience, but the SLI underneath is the only layer you have to build, and its definition decides what the other two mean.
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.