Issue Description
When you create a file in the Linux CVM, the error "no space left on device" is reported.
Common Causes
The disk space is full
The file system's inode is full
df and du are different
Files have been deleted, but there are still processes holding corresponding file handles, resulting in the disk space not being released.
Mounts are nested. For example, if the /data directory of the system disk uses a lot of space, and /data is used as a mount point of other data disks, then the df and du of the system disk will be different.
Solution
Troubleshoot the problems as instructed in Steps. Steps
Solving the problem of full disk space
2. Run the following command to check the disk utilization.
3. Locate the mount point with a high disk utilization and run the following command to enter the mount point.
For example, to enter the system disk mount point, run cd /.
4. Run the following command to find directories that occupy a large space.
du -x --max-depth=1 | sort -n
Perform the following steps for the located directory with the largest occupied space:
If the directory capacity is large, perform step 2 to locate files that occupy a large space and evaluate whether they can be deleted based on the business conditions. If not, expand the disk capacity as instructed in Expanding Cloud Disks. Solving the problem of full file system inode
2. Run the following command to check the disk utilization.
3. Locate the mount point with a high disk utilization and run the following command to enter the mount point.
For example, to enter the system disk mount point, run cd /.
4. Run the following command to find the directory with the largest number of files. This command is time-consuming, so wait patiently.
find / -type f | awk -F / -v OFS=/ '{$NF="";dir[$0]++}END{for(i in dir)print dir[i]" "i}' | sort -k1 -nr | head
Solving the problem of df and du inconsistency
Solving the problem of processes occupying file handles
Run the following command to view the processes occupying files.
Perform the following steps according to the returned result:
Kill the corresponding processes.
Restart the service.
If many processes occupy file handles, restart the server.
Solving the problem of nested mounts
1. Run the mount command to mount a highly utilized disk to /mnt; for example:
2. Run the following command to enter /mnt.
3. Run the following command to find directories that occupy a large space.
du -x --max-depth=1 | sort -n
According to the returned result, evaluate whether the directories or files can be deleted based on the business conditions.
4. Run the umount command to unmount the disk; for example: