Reference: Disk File System
1. Create a test script:
[Oracle @ ocm1 ~] $ Vi touchfile. sh
#! /Bin/bash
For abc in {1 .. 9}
Do
Touch/boot/test/$ abc
Done
"Touchfile. sh" 5L, 66C written
2. Create a test directory and test script [root @ ocm1 oracle] # cd/boot
[Root @ ocm1 boot] # mkdir test
[Root @ ocm1 boot] # ls
Config-2.6.18-308.el5 symvers-2.6.32-300.10.1.el5uek.gz
Config-2.6.32-300.10.1.el5uek System. map-2.6.18-308.el5
Grub System. map-2.6.32-300.10.1.el5uek
Initrd-2.6.18-308.el5.img test
Initrd-2.6.32-300.10.1.el5uek.img vmlinuz-2.6.18-308.el5
Lost + found vmlinuz-2.6.32-300.10.1.el5uek
Symvers-2.6.18-308.el5.gz
[Root @ ocm1 boot] # cd-
/Home/oracle
[Root @ ocm1 oracle] # sh touchfile. sh
[Root @ ocm1 oracle] # cd-
/Boot
[Root @ ocm1 boot] # cd test
[Root @ ocm1 test] # ls
1 2 3 4 5 6 7 8 9
3. view the number of Inodes available in the current/boot directory [root @ ocm1 test] # df-I
Filesystem Inodes IUsed IFree IUse % Mounted on
/Dev/sda3 7318528 185460 7133068 3%/
/Dev/sda1
26104 5026054 1%/boot
Tmpfs 128334 1 128333 1%/dev/shm
4. Modify the script to directly use Inodes [root @ ocm1 boot] # cd/home/oracle/
[Root @ ocm1 oracle] # vi touchfile. sh
#! /Bin/bash
For abc in {10 .. 26110}
Do
Touch/boot/test/$ abc
Done
~
"Touchfile. sh" 5L, 71C written
5. Run the script. If the script is not completed, the error "No space left on device" is returned,
In fact, df-h can be used to view the available space in the directory. However, because No Inodes exists, you cannot create a new file. The error is: No space left on device.
[Root @ ocm1 oracle] # sh touchfile. sh
[Root @ ocm1 oracle] # sh touchfile. sh
Touch: cannot touch '/boot/test/100': No space left on device
Touch: cannot touch '/boot/test/100': No space left on device
......................................................
Touch: cannot touch '/boot/test/100': No space left on device
Touch: cannot touch '/boot/test/100': No space left on device
[Root @ ocm1 oracle] #
Df-h
Filesystem Size Used Avail Use % Mounted on
/Dev/sda3 28G 11G 15G 43%/
/Dev/sda1 99 MB 21 M 73 M 23%/boot
Tmpfs 502 M 0 502 M 0%/dev/shm
[Root @ ocm1 oracle] # df-I
Filesystem Inodes IUsed IFree IUse % Mounted on
/Dev/sda3 7318528 185460 7133068 3%/
/Dev/sda1 26104 26104 0 100%/boot
Tmpfs 128334 1 128333 1%/dev/shm
The same error is reported when you manually execute the create directory and file command:
[Root @ ocm1 oracle] # cd/boot/
[Root @ ocm1 boot] # mkdir
Mkdir: cannot create directory 'A': No space left on device
[Root @ ocm1 boot] # touch abc
Touch: cannot touch 'abc': No space left on device
