General Problems
What storage classes does CFS support
Currently, CFS offers a single storage specification, using SSD media for data storage.
What protocol types does CFS support
CFS currently supports the widely adopted NFS 4.1 protocol. Development for SMB/CIFS and NFS 4.0 support is underway—stay tuned for updates.
How many file systems can each user create
Within the same region, each user can create up to 20 file systems.
How many mount targets can be created per file system
At present, there is no limit on the total number of mount targets that can be created for a single file system. However, only one mount target can be created per subnet within a VPC.
Can mount targets be accessed across availability zones
Yes, as long as the mount target address is connected to the access end's network.
Is CFS backup function charged
The CFS backup feature is currently in its free trial period. Specific billing details will be uniformly released before the trial ends and charges are implemented.
Which regions has CFS been launched in
You can verify if the CFS service is available in a particular region by switching regions on the console interface.
How does CFS ensure data availability and reliability
Each piece of data in CFS is redundantly stored across multiple replicas, with modules featuring load balancing and automatic failover to ensure maximum data availability and reliability.
How to choose between Baidu AI Cloud Object Storage (BOS), Cloud Disk Service (CDS), and Cloud File Server (CFS)
You can evaluate which type of storage to use based on your own usage scenarios. The following are the main differences between several products:
| BOS | CDS | CFS | |
|---|---|---|---|
| API type | HTTP API | Block device API | Posix-compatible API |
| Random read/write performance | Not supported | Support | Support |
| Latency | Maximum | Lowest | Higher than CDS, lower than BOS |
| Data reliability | Multiple replicas, stored across multiple availability zones | Multiple replicas, stored within a single availability zone | Multiple replicas, stored within a single availability zone |
| Data consistency | Strong consistency | Strong consistency | Strong consistency |
| Maximum capacity | Unlimited | Tens of TB | Hundreds of PB |
| Concurrent client access capability | Can be accessed by multiple clients simultaneously | Can not be accessed by multiple clients simultaneously | Can be accessed by multiple clients simultaneously |
| Client region restriction | Accessible via public network and from any region | Virtual machines within the same availability zone | Virtual machines or containers within the same region |
| Main application scenarios | Distribution and backup of massive data, data analysis and data processing | Scenarios without data sharing needs, such as virtual machine root disks and I/O-intensive services (e.g., databases) | Scenarios requiring data sharing, such as data analysis, data processing, shared logs, etc., and it works well with containers |
How to query client read/write throughput traffic
When a file system is mounted to many clients, if you want to quickly find the clients with the top instantaneous read/write throughput traffic, or if you want to know the historical read/write throughput traffic and statistical data of the specific clients mounted to the file system, you can refer to the View File System Details document for operation.