Microsoft Certified: Azure Developer Associate (AZ-204)Develop Azure compute solutionsMedium
A company is developing an Azure Function that needs to process a high volume of messages from an Azure Service Bus queue. The function must guarantee message delivery, support concurrent execution of up to 100 instances, and process messages efficiently with minimal latency. It also requires integration with a Virtual Network (VNet) for secure access to other Azure resources. Which Azure Function plan is the MOST appropriate for this scenario?
- APremium plan
- BElastic Premium plan
- CConsumption plan
- DDedicated (App Service) plan
Show answer & explanationAnswer & explanation
Correct answer: A. Premium plan
The Azure Functions Premium plan (also known as Elastic Premium) offers pre-warmed instances, VNet integration, and configurable maximum scale-out limits (up to 100 instances for this scenario), which ensures minimal latency and efficient processing for high-volume, concurrent workloads with VNet connectivity. The 'Elastic Premium' and 'Premium' plan are often used interchangeably in documentation, with 'Premium' being the official name.
Why the other options are wrong
- B. Elastic Premium plan is the same as the Premium plan, but 'Premium plan' is the more common and official name. If 'Elastic Premium' is an option, it refers to the same underlying service as 'Premium plan'.
- C. Consumption plan scales dynamically but can have cold start issues and limited VNet integration options for high-performance needs.
- D. Dedicated (App Service) plan provides fixed capacity and VNet integration but lacks the elastic scaling and cost efficiency for serverless functions.
Azure Functions Premium Plan
The Azure Functions Premium plan offers enhanced performance, VNet integration, and scale-out capabilities beyond the Consumption plan, making it suitable for demanding serverless workloads.
- Pre-warmed instances for zero cold starts.
- VNet connectivity for secure resource access.
- Configurable scale-out limits and dedicated compute resources.
- Guaranteed message delivery with longer execution times.
Memory trick: Premium Plan: 'P'erformance, 'P'rivate network, 'P'owerful scaling.