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When we work against multiple Azure Services for a Single Product we need to handle the SLA (Service Level Agreement) carefully. It is not min or max or the average of SLA per services. Let's take an example,
Table 1
Service |
SLA |
App Service |
99.95% |
Azure Active Directory |
99.9% |
What these % means,
% |
Downtime/week |
Downtime/month |
Downtime/year |
90% |
16.8 hours |
72 hours |
36.5 days |
99% |
1.68 hours |
7.2 hours |
3.65 days |
99.9% |
10.1 minutes |
43.2 minutes |
8.76 hours |
99.99% |
1.01 minutes |
4.32 minutes |
52.56 minutes |
99.999% |
6.05 seconds |
25.9 seconds |
5.26 minutes |
99.9999% |
0.605 seconds |
2.59 seconds |
31.5 seconds |
All the SLA of Azure is defines at https://azure.microsoft.com/en-us/support/legal/sla/
Based on Table 1 if an application uses both the Azure Services then the composite SLA of the Application would be
0.9995 x 0.999 = 0.9985005
Hence 99.85%. So it is neither 99.95% nor 99.9% it is altogether different.
Also one need to consider if there is anything in Application which defines its SLA.
Namoskar!!!