Auto scaling App Service in Azure - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is Auto Scaling in Azure App Service?

Auto Scaling automatically adjusts the number of running app instances based on demand to keep your app responsive and cost-effective.

beginner

Name two common metrics used to trigger auto scaling in Azure App Service.

CPU usage and HTTP queue length are common metrics used to decide when to add or remove app instances.

beginner

What is a scale-out action in Azure App Service auto scaling?

Scale-out means adding more instances of your app to handle increased traffic or load.

beginner

How does Azure App Service auto scaling help control costs?

It reduces the number of running instances when demand is low, so you only pay for what you need.

beginner

What is a scale-in action in Azure App Service auto scaling?

Scale-in means removing instances of your app when demand decreases to save resources.

Which metric is NOT typically used to trigger auto scaling in Azure App Service?

A Memory usage

B HTTP queue length

C CPU usage

D Disk space used

Disk space used is generally not used for auto scaling decisions in Azure App Service; CPU, memory, and HTTP queue length are common triggers.

What happens during a scale-out event in Azure App Service?

A App instances are added

B App service is restarted

C App service is stopped

D App instances are removed

Scale-out means adding more instances to handle increased load.

Why is auto scaling important for an app running on Azure App Service?

A To automatically adjust resources based on demand

B To increase app security

C To manually control app updates

D To backup app data

Auto scaling automatically adjusts the number of app instances to match demand, improving performance and cost efficiency.

Which of the following is a benefit of scale-in in Azure App Service?

A Increases app traffic

B Improves app security

C Saves costs by reducing instances

D Backs up app data

Scale-in reduces the number of running instances when demand is low, saving costs.

How can you configure auto scaling rules in Azure App Service?

A Only by editing app code

B Using Azure Portal or Azure CLI

C By restarting the app service

D By changing DNS settings

Auto scaling rules can be set up easily through the Azure Portal or Azure CLI.

Explain how auto scaling works in Azure App Service and why it is useful.

Think about how your app can handle more users or less traffic without manual changes.

Describe the difference between scale-out and scale-in actions in Azure App Service auto scaling.

Consider what happens when your app gets busier or quieter.