Limitations and Constraints
SFS Capacity-Oriented
Item |
Description |
---|---|
Access method |
SFS Capacity-Oriented file systems can only be accessed over the intranet and used on the cloud. |
Supported protocols |
|
Max. number of clients per file system |
10,000 |
Max. capacity per file system |
4 PB |
Max. size of a single file |
240 TB |
Multi-VPC access |
Supported. A maximum of 20 VPCs can be added for a file system, and a maximum of 400 ACL rules are allowed for all added VPCs. |
Max. enterprise projects supported |
20. If there are more than 20 enterprise projects, SFS Capacity-Oriented file systems may fail to be created. In this case, SFS Turbo file systems are recommended. |
Replication |
Not supported |
Cross-region mounting |
Not supported |
Cross-account mounting |
Not supported |
SFS 3.0 Capacity-Oriented
Item |
Description |
---|---|
Access method |
SFS 3.0 Capacity-Oriented file systems can only be accessed over the intranet. |
Supported protocols |
Only NFSv3 is supported (NFSv4 is not supported). |
Max. number of clients per file system |
10,000 |
File system encryption |
Not supported |
Max. number of files or subdirectories in a single directory |
30 million |
File system name |
Must be globally unique. It cannot be the same as the name of any existing SFS 3.0 Capacity-Oriented file system, including one created by the current user or any other user. And it cannot be changed after the file system is created. |
File system deletion |
An SFS 3.0 Capacity-Oriented file system with the same name as a deleted SFS 3.0 file system can only be created 30 minutes after that file system has been deleted. |
Client OS |
|
Changing root directory permissions |
Not supported |
Restrictions in the CCE and CCI scenarios |
|
Lifecycle management |
A maximum of 20 lifecycle rules can be configured for a file system. |
SFS Turbo
Item |
General |
---|---|
Access method |
VPN, Direct Connect, and Cloud Connect |
Max. bandwidth |
2 GB/s |
Max. IOPS |
100,000 |
Min. latency |
1 to 2 ms |
Max. capacity per file system |
320 TB |
Supported protocol |
NFSv3 |
Max. number of clients per file system |
500 |
Max. number of authorized VPCs per file system |
20 |
Max. size of a single file |
16 TB |
Max. number of files or subdirectories per file system |
1 billion |
Max. number of files or subdirectories in a single directory |
20 million
NOTE:
If you need to execute the ls, du, cp, chmod, or chown command on a directory, you are advised to place no more than 500,000 files or subdirectories in that directory. Otherwise, requests may take long times as the NFS protocol sends a large number of requests to traverse directory files and requests are queueing up. |
Max. directory depth (unit: layer) |
100 |
Max. path length (unit: byte) |
1,024 |
Max. soft link length (unit: byte) |
1,024 |
Max. hard link length (unit: byte) |
255 |
Max. number of file systems |
32 by default. You can submit a service ticket to increase the quota. |
File system backup |
Supported |
Backup data restoring to the original file system |
Not supported
NOTE:
SFS Turbo uses single-AZ deployment. SFS Turbo file systems will fail if their AZ fails. |
File locking with Flock |
Not supported |
Cross-region mounting via domain name |
Not supported
NOTE:
|
Cache acceleration |
Not supported |
File system tagging |
|
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