File System Performance Was Poor

Data was written slowly to a file system, the file system performance cannot meet service requirements, or file transfer was slow.

Possible causes are described in order of how likely they are to occur.

If the fault persists after you have ruled out one cause, move on to the next one.

Figure 1 Fault diagnosis

**Table 1** Fault diagnosis
Possible Cause	Solution
The file system and the servers are not in the same AZ.	Create a file system in the same AZ as the servers, migrate the data from the original file system to the new file system, and mount the new file system to the servers.
The file system type is not ideal for the application scenario.	Select an appropriate file system type based on your workloads. For details, see File System Types.
There are too many or too few concurrent requests.	Too many or too few concurrent requests may deteriorate the file system performance. Submit a service ticket.
The local network is faulty.	Rectify the network fault.