Availability is usually defined as a given number of nines, describing the number of minutes or seconds of estimated downtime in relation to the number of minutes in a 365-day year:
|
Availability % |
Downtime in minutes |
Downtime/Year |
Nines |
|
90 |
52,560.00 |
36.5 Days |
One Nine |
|
99 |
5,256.00 |
4 Days |
Two Nines |
|
99.9 |
525 |
8.8 hours |
Three Nines |
|
99.99 |
52.56 |
53 minutes |
Four Nines |
|
99.999 |
5.26 |
5.3 Minutes |
Five Nines |
|
99.9999 |
0.53 |
32 Seconds |
Six Nines |
We need to decide the Availability % SLA for the Event-Data Pipeline based on individual requirements.