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Volcano Engine Function as a Service

Function management

Selecting a function creation approach

To meet your requirements in different scenarios, veFaaS provides multiple types of functions. This topic introduces the applicable scenarios and differences among types to help you select an appropriate type.

Comparison item	Event function	Web app	Microservices app	Task
Application scenarios	Write programs by using the interface defined by veFaaS.	Write programs based on popular frameworks in various languages, such as Python Flask and Golang Gin. Migrate existing web apps. Deploy through container images to gain full control over the web program runtime, with no language restrictions.	Host applications of any language and framework, such as microservices apps and MQ consumer services. Smoothly migrate containerized applications.	Respond to asynchronous invocation requests through the task mode, where the program exits after execution. The status of each task phase can be tracked and persisted, which provides rich task control and observability capabilities.
Deployment method	Code package	Code package Container image	Code package Container image	Code package Container image
CPU allocation mode	CPU is allocated only during request processing	CPU is allocated only during request processing	CPU is always allocated	CPU is allocated only during request processing
GPU instance support	Not supported	Supported when using container imagesner images	Supported when using container images	Supported when using container images
Cold start	Fatest. The cold start is the fastest because the code package does not include the runtime.	Deployment through a code package is faster than that through a container image.	Deployment through a code package is faster than that through a container image.	Deployment through a code package is faster than that through a container image.
Code package size and format	The uncompressed code package is a .zip file with a size of up to 256 MiB.
Image size and format	The uncompressed image is 1 GiB in size. For the image format, see What is CR?
Runtime environment	Python, Golang, and Node.js	Native Python and Native	Native	Native
Traffic integration method	Triggers	Triggers	Triggers are not supported.	Triggers

Last updated: 2026.08.19 14:06:05