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Difficulty: Very hardConfigure Azure App Service Plans

An administrator is planning the deployment of a critical web application to Azure App Service. The application must meet the following requirements:

* Must support autoscaling based on memory usage, up to a maximum of 12 instances.
* Must support at least 4 deployment slots (excluding the production slot) for testing.
* Must support automated backups scheduled twice daily.

Which of the following is the most cost-effective App Service Plan pricing tier that meets all these requirements?

  1. A
    B1
  2. B
    S1
  3. P1v3Answer
  4. D
    I1v2

Answer

The Premium v3 (P1v3) tier is the correct choice because it is the most cost-effective tier that supports autoscaling up to 30 instances (meeting the 12-instance requirement), up to 20 deployment slots, and up to 50 daily automated backups.
The Premium v3 (P1v3) tier meets all the requirements. It supports autoscaling up to 30 instances (satisfying the 12-instance requirement), up to 20 deployment slots (satisfying the 4-slot requirement), and up to 50 daily backups (satisfying the twice-daily backup requirement). It is the most cost-effective tier that does so, as the Isolated tier is more expensive.

Step-by-Step Solution

1
Analyze the scale-out requirement.
The application requires autoscaling up to 12 instances. Basic (B1) supports manual scale up to 3 instances. Standard (S1) supports autoscaling but limits the maximum scale-out to 10 instances. Premium v3 (P1v3) supports autoscaling up to 30 instances, and Isolated v2 (I1v2) supports up to 100 instances.
Determine which tiers meet the scale-out constraint.
2
Analyze the deployment slots requirement.
The application requires at least 4 deployment slots. Basic (B1) does not support deployment slots. Standard (S1) supports up to 5 deployment slots. Premium v3 (P1v3) supports up to 20 deployment slots, and Isolated v2 (I1v2) supports up to 20 deployment slots.
Determine which tiers meet the deployment slot constraint.
3
Analyze the backup requirement.
The application requires automated backups twice daily. Basic (B1) does not support scheduled backups. Standard (S1) supports up to 10 daily backups. Premium v3 (P1v3) supports up to 50 daily backups, and Isolated v2 (I1v2) supports up to 50 daily backups.
Determine which tiers meet the backup constraint.
4
Compare the valid tiers (P1v3 and I1v2) for cost-effectiveness.
Both Premium v3 (P1v3) and Isolated v2 (I1v2) meet all requirements. Since P1v3 is significantly less expensive than I1v2, it is the most cost-effective option.
Select the lowest-cost tier that satisfies all requirements.

Key Concept

Azure App Service Plan Tier Limits and Capabilities
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Topics

Configure Azure App Service Plans

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