Site reliability and 9's

[#rickard-sre-math] makes it clear that adding 9's to your SLAs is a big commitment. While the meaning of a 9 scales linearly, the effort goes exponentially.

Anyways, for refs:

Uptime - Downtime (Yearly)
99.00000%  - 3d 15h 39m
99.90000%  - 8h 45m 56s 
99.99000%  - 52m 35s
99.99900%  - 5m 15s
99.99990%  - 31s
99.99999%  - 3s

[#rickard-sre-math]: Matt Rickard. “Service Reliability Math That Every Engineer Should Know,” August 8, 2021. https://matt-rickard.com/service-reliability-math-that-every-engineer-should-know/.