Usage Limits and Recommendations
Updated at：2025-11-11
Usage restrictions
The CFS product has the following quota limits:
| Limitation items | Limit |
|---|---|
| Maximum number of file systems per user | 20 counts |
| Capacity of individual file system | 100PB |
| Maximum number of files per file system | 100 billion |
| Size of single file | 1PB |
| Directory depth | 1,000 levels |
| Symlink path length | 4,080 bytes |
| File name length | 255 bytes |
| Maximum number of concurrent connected clients | Thousands |
Usage recommendations
1. The maximum number of files or subdirectories under a single directory should not exceed 10 million.
Note: If more than 10 million files or subdirectories are stored in a single-level directory, operations on that directory may trigger the NFS protocol to send a significant number of traversal requests to the server. This can result in request queuing, leading to high latency or request failures.