You have an Azure application that uses the services shown in the following table. How should you calculate the composite SLA for the application?
- A0.999 * 0.9999 = 0.9989001 = 99.89001% (correct answer)
- B0.999 / 0.9999 = 0.9991 = 99.91%
- CMax(0.999, 0.9999) = 0.9999 = 99.99%
- DMin(0.999, 0.9999) = 0.999 = 99.9%
Reveal answer & explanationHide answer
For services called in sequence (both must be available for the application to work), the composite SLA is the product of the individual SLAs: 0.999 * 0.9999 = 0.9989001 = 99.89001%. Multiplying always yields a composite SLA lower than the least-available component.