FunctionGraph Best Practices

Updated on 2025-07-10 GMT+08:00

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This document summarizes practices in common application scenarios of FunctionGraph. Each practice case is given detailed solution description and operation guidance, helping you easily build your services based on FunctionGraph.

Performance Optimization and Security

**Table 1** Performance optimization and security practices
Practice	Description
Performance Optimization	Introduces performance optimization practices including cold start and function execution improvement and provides guidance to help you build more efficient and stable applications on FunctionGraph.
Cold Start Optimization	Optimize the cold start of a function to improve user experience in building a serverless architecture.
Security Best Practices	Improve the overall security capability of FunctionGraph.

Data Processing Practices

**Table 2** Data processing best practices
Practice	Description
Using FunctionGraph to Convert DIS Data Format and Store the Data to CloudTable	Use functions and DIS to collect real-time IoT data streams, convert the format of the collected data, and store the data to CloudTable Service.
Uploading Files Using APIs in FunctionGraph	Use Node.js and Python as examples to describe how to configure a backend parsing function and use APIG to upload files from devices to cloud servers. This feature applies to web and app scenarios, such as reporting service run logs and uploading web app images.
Converting Device Coordinate Data in IoTDA	Use functions and IoTDA to transfer data reported by IoT devices and device status changes to FunctionGraph to trigger function running and convert coordinates (from WGS84 coordinates to GCJ02 coordinates). It is applicable to scenarios such as processing device-reported data for storage in OBS, structuring and cleansing reported data before storing it in databases, and triggering event notifications based on device status changes.
Using FunctionGraph to Encrypt and Decrypt Files in OBS	Use a function and an OBS Application Service trigger to encrypt and decrypt files in OBS.
Identifying Abnormal Service Logs in LTS and Storing Them in OBS	Use LTS to configure a function for extracting alarm logs, identify abnormal log data in LTS, store the data in an OBS bucket, and use SMN to push alarm SMS messages and emails to service personnel.
Using FunctionGraph to Filter Logs in LTS in Real Time	Configure a function to extract log data, analyze and filter key information, and transfer the data to LTS.
Using FunctionGraph to Rotate Images Stored in OBS	Use a function flow to automatically rotate images in OBS. Function flows are available in CN East-Shanghai1 and AP-Singapore.
Using FunctionGraph to Compress and Watermark Images	Use a function flow to automatically compress and watermark images. Function flows are available in CN East-Shanghai1 and AP-Singapore.

Functional Application Practices

**Table 3** FunctionGraph functional application best practices
Practice	Description
Using FunctionGraph and CTS to Identify Login and Logout Operations from Invalid IP Addresses	Configure functions for obtaining, analyzing, and processing cloud service resource operation information using CTS, and then push alarm SMS messages and emails using SMN to notify service personnel of handling the alarms.
Using FunctionGraph to Periodically Start and Stop ECSs	Configure a function to periodically enable or disable the ECS function of Huawei public cloud VMs.
Using FunctionGraph Functions As the Backend to Implement APIG Custom Authorizers	Quickly create an API whose backend service is FunctionGraph and call the API using custom authorizer.
Using FunctionGraph HTTP Functions to Process gRPC Requests	Process gRPC requests in FunctionGraph. Currently, only the LA-Santiago region is supported.
Using a Java Function and Log4j2 to Print Logs	Use Java functions to configure Log4j2 to print logs.
Using FunctionGraph to Deploy Stable Diffusion for AI Drawing	Deploy Stable-Diffusion applications in the application center of FunctionGraph and provides multiple methods for customizing AI drawing applications.
Using FunctionGraph to Deploy DeepSeek-R1 Distilled Model	Deploy the DeepSeek-R1 distilled model via container image-based HTTP function in collaboration with a third-party client to achieve AI dialog.
Deploying an MCP Server Using FunctionGraph	Deploy popular open-source MCP server applications in one click in FunctionGraph and provide services accessible from the Internet through APIG.

Function Building Practices

**Table 4** Function building best practices
Practice	Description
Building an HTTP Function Using an Existing Spring Boot Project	Deploy a Spring Boot application as an HTTP function on FunctionGraph.
Building an HTTP Function Using Go	Deploy a Go application as an HTTP function on FunctionGraph.