Over the past 3 years, a cloud service has been unavailable for a total of 36 hours, primarily due to a denial of service attacks. Additionally, the physical server hosting the cloud service crashed once. It took the cloud provider 4 days to replace the physical server and for the cloud service to become operational again. Based on these statistics over the past 3 years, What is the availability rating of the cloud service?
What will be an ideal response?
Availability calculation:
36 hours + 96 hours = 132 hours of downtime
24 hours x 365 days x 3 years = 26,280 total hours during measured period
132 / 26,280 = 0.005
0.005 x 100 = 0.5
100 = 0.5 = 99.5
The availability rating is 99.5%
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