Linux 文件系統 inode 耗盡 剩餘空間無法創建新文件

演示inode耗盡系統提示空間不足場景

測試環境準備 掛載一個10M大小的tmpfs到 /mnt

[root@localhost tmp]# mount -t tmpfs none /mnt/ -o size=10M
[root@localhost tmp]# cd /mnt/
[root@localhost tmp]# df -hT /mnt/
Filesystem     Type   Size  Used Avail Use% Mounted on
none           tmpfs   10M     0   10M   0% /mnt
[root@localhost mnt]# df -i /mnt
Filesystem     Inodes IUsed  IFree IUse% Mounted on
none           124747     1 124746    1% /mnt
#創建大量空文件耗盡inode  
[root@localhost mnt]# echo file{1..124747} | xargs touch 
touch: cannot touch ‘file124747’: No space left on device

[root@localhost mnt]# df -i /mnt
Filesystem     Inodes  IUsed IFree IUse% Mounted on
none           124747 124747     0  100% /mnt
[root@localhost mnt]# df /mnt
Filesystem     1K-blocks  Used Available Use% Mounted on
none               10240     0     10240   0% /mnt

[root@localhost mnt]# touch 1.txt
touch: cannot touch ‘1.txt’: No space left on device
#inode耗盡 無法創建空文件
[root@localhost mnt]# \cp -v /etc/man_db.conf file1
‘/etc/man_db.conf’ -> ‘file1’
#數據空間還有剩餘 所以可以把數據寫入空文件中
[root@localhost mnt]# df /mnt/
Filesystem     1K-blocks  Used Available Use% Mounted on
none               10240     8     10232   1% /mnt

刪除測試文件,卸載 /mnt

[root@localhost mnt]# find ./ -name "file*" | xargs rm -f 
[root@localhost mnt]# ls
[root@localhost mnt]# cd /tmp/
[root@localhost tmp]# umount -v /mnt
umount: /mnt (none) unmounted