Microsoft Azure For Dummies by Timothy L. Warner

Author:Timothy L. Warner
Language: eng
Format: epub
ISBN: 9781119612155
Publisher: Wiley
Published: 2020-03-10T00:00:00+00:00

Getting to know Azure Functions apps

You can think of Azure Functions as being code as service, by which you upload your source code, and Azure runs it for you. Specifically, Azure runs your function based on a trigger, which is a type of event. The event could be a manually initiated trigger, a scheduled trigger, or some action that takes place elsewhere in Azure.

A function app is a container object; you can enclose one or more individual Azure Functions within the function app. The compute and application run time exist at the function-app level and are shared by all enclosed Functions.

A function is a named section of a program that performs a specific task. Normally, applications consist of multiple functions. By contrast, Azure Functions are individual, named code blocks that are scoped to perform one action very well.

You have two ways to pay for an Azure Function:

Consumption plan: Azure allocates compute dynamically whenever your function runs. You’re charged for the number of function executions per month; Microsoft has a generous free tier. The downside is that the consumption-cost model can be much slower than the App Service plan model.

App Service plan: This pricing model mirrors that of App Service web apps. The benefit is more-predictable performance because you have control of the underlying compute power.

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