CompTIA Cloud Essentials+ (CLO-002)Cloud ConceptsMedium
A cloud provider offers a service level agreement (SLA) for a compute instance with 99.95% availability. How much total downtime, in minutes, is allowed per year under this SLA?
- A262.8 minutes
- B26.28 minutes
- C438 minutes
- D43.8 minutes
Show answer & explanationAnswer & explanation
Correct answer: A. 262.8 minutes
To calculate the allowed downtime, first determine the total minutes in a year: 365 days * 24 hours/day * 60 minutes/hour = 525,600 minutes. Then, calculate the allowed downtime percentage: 100% - 99.95% = 0.05%. Finally, multiply total minutes by the downtime percentage: 525,600 * 0.0005 = 262.8 minutes.
Why the other options are wrong
- B. Incorrect calculation of total minutes or downtime percentage.
- C. Incorrect calculation, results from using 0.005 (0.5%) downtime instead of 0.0005 (0.05%).
- D. Incorrect calculation, potentially using 99.9% or a wrong time base.
SLA Availability Calculation
The process of determining the maximum allowed downtime for a service based on its guaranteed uptime percentage over a specific period.
- Uptime is typically expressed as a percentage (e.g., 99.9%).
- Downtime is 100% minus the uptime percentage.
- Calculated over a defined period (e.g., month, year).
Memory trick: SLA Downtime: Subtract from 100, then multiply by total time.