Uptime Guarantee

Q: What does 99.99% uptime mean in practice?

99.99% uptime allows approximately 52.6 minutes of downtime per year, or about 4.38 minutes per month. This is known as 'four nines' and requires highly redundant architecture.

ClauseOps

An uptime guarantee is a contractual promise to maintain a specific level of service availability over a defined period. Common targets include 99.9% (8.76 hours downtime/year), 99.95% (4.38 hours), and 99.99% (52.6 minutes). The difference between 99.9% and 99.99% uptime may seem small but…