## Overview
[Tencent Cloud's Serverless Cloud Function](https://intl.cloud.tencent.com/product/scf) (SCF) is a serverless execution environment that enables you to build and run applications without having to purchase and manage servers. Simply code in a supported language and set the execution conditions, and your code can be run on the Tencent Cloud infrastructure elastically and securely. SCF is an ideal computing platform for use cases such as real-time file processing and data processing.
SCF is a service-level computing resource that features fast iteration and super-fast deployment. As a result, it requires the separation of storage and computing, which makes CFS, a high-performance shared storage service, the best storage solution for SCF. With only a few easy steps, your function can easily access files stored in CFS. The benefits of using CFS on SCF are as follows:
- The execution space of functions is unlimited.
- Multiple functions can share the same file system to share files.
## Directions
### Associating SCF with a CFS access policy
>!To use the CFS service, SCF needs permission to operate on your CFS resources.
Follow the steps below to grant the permission to your account:
1. Associate the `SCF_QcsRole` role with the `QcloudCFSReadOnlyAccess` policy as instructed in [Modifying a Role](https://intl.cloud.tencent.com/docum
