Concepts

Function

Functions are code defined to handle events.

Event Source

An event source is a public cloud service or custom application that publishes events.

Synchronous Invocation

Clients wait for explicit responses to their requests from a function. Responses are returned only after the function is invoked.

Asynchronous Invocation

Clients do not care about the function invocation results of their requests. After receiving a request, FunctionGraph puts it in a queue, returns a response, and processes other requests when there are idle resources.

Trigger

A trigger is an event that triggers function execution.

Function Flow

You can drag, configure, and connect components on the UI and create function flow tasks to complete orchestration in complex scenarios.

Single-Instance Multi-Concurrency

The number of requests that can be concurrently processed by an instance.

Custom Images

You can directly package and upload container images. The platform then loads and starts these images to create functions.

Custom Function Execution

You can customize scripts and files to execute functions.

Function Logs

Logs generated during function invocation.

Function Monitoring

Monitoring information generated during function execution.

Function Version

FunctionGraph allows you to publish one or more versions throughout the development, testing, and production processes to manage your function code. The code and environment variables of each version are saved as a snapshot. After the function code is published, modify settings when necessary.

Function Alias

You can create an alias for a specific function version. To roll back to a previous version, use the corresponding alias to represent the version instead of modifying the function code.

Each function alias can be bound to a major version and an additional version for traffic shifting.

Dependency Package

FunctionGraph enables you to manage dependencies in a unified manner. You can upload dependencies from a local path, or through OBS if they are too large, and specify names for them.

For details about how to generate function dependencies, see How Do I Create Function Dependencies?

Tracing

Service calls can be traced and recorded, so that the execution paths and statuses of service requests in distributed systems can be restored to quickly locate performance bottlenecks and faults.

Bootstrap File

The bootstrap file is the startup file of an HTTP function. The HTTP function can only read bootstrap as the startup file name. If the file name is not bootstrap, the service cannot be started.