Suggested Answer:
Composite SLAs involve multiple services supporting an application, each with differing levels of availability. For example, consider an App Service web app that writes to Azure SQL Database. At the time of this writing, these Azure services have the following SLAs: App Service web apps = 99.95% ✑ SQL Database = 99.99% What is the maximum downtime you would expect for this application? If either service fails, the whole application fails. The probability of each service failing is independent, so the composite SLA for this application is 99.95% ֳ— 99.99% = 99.94%. That's lower than the individual SLAs, which isn't surprising because an application that relies on multiple services has more potential failure points. Reference: https://docs.microsoft.com/en-us/azure/architecture/reliability/requirements#understand-service-level-agreements
The explanation has an error is not "-" is "x"
App Service web apps = 99.95%
SQL Database = 99.99%
The probability of each service failing is independent, so the composite SLA for this application is 99.95% × 99.99% = 99.94%.
Thanks for the clarification. Product has to be multiplication of something, not subtraction. The question in my mind was multiplication of what would give me 99.94 - you clarified it.
This is a math concept: A product in math is what is produced when two or more numbers are multiplied together.
Essentially a Composite SLA is calculated by multiplying the Service Level Agreement of the various components you are using in a Stack.
So we have: 99.95 multiplied by 99.99 = 99.94
What is the maximum downtime you would expect for this application? If either service fails, the whole application fails. The probability of each service failing is independent, so the composite SLA for this application is 99.95% × 99.99% = 99.94%. That's lower than the individual SLAs, which isn't surprising because an application that relies on multiple services has more potential failure points.
No, but the material says they will not ask you to do the computation. Notice that here the right answer was the product, and the correct answer states the computation result.
Correct. To get overall SLA you have to multiply SLA of each service in that case.
upvoted 2 times
...
This section is not available anymore. Please use the main Exam Page.AZ-900 Exam Questions
Log in to ExamTopics
Sign in:
Community vote distribution
A (35%)
C (25%)
B (20%)
Other
Most Voted
A voting comment increases the vote count for the chosen answer by one.
Upvoting a comment with a selected answer will also increase the vote count towards that answer by one.
So if you see a comment that you already agree with, you can upvote it instead of posting a new comment.
MCLC2021
Highly Voted 4 years agoPN60
8 months, 1 week agoDevOpposite
Highly Voted 3 years, 9 months agoSuper63
Most Recent 8 months agolara400
8 months agorasbon
1 year, 11 months agozellck
2 years, 5 months agozellck
2 years, 5 months agoos_ca
3 years, 10 months agosugarfrosted
3 years, 6 months agokedamni
3 years, 10 months ago[Removed]
3 years, 11 months agoccalvarezp
3 years, 12 months agoKashim
4 years ago