模拟Linux磁盘分区有可用空间无可用Inodes时报错：No space left
参考：磁盘文件系统 http://www.linuxidc.com/Linux/2014-04/100792.htm
1.创建测试脚本：
[Oracle@ocm1 ~]$ vi touchfile.sh
#!/bin/bash
for abc in {1..9}
do
touch /boot/test/$abc
done
"touchfile.sh" 5L, 66C written
2.创建测试目录、测试脚本
[root@ocm1 oracle]# cd /boot
[root@ocm1 boot]# mkdir test
[root@ocm1 boot]# ls
config-2.6.18-308.el5 symvers-2.6.32-300.10.1.el5uek.gz
config-2.6.32-300.10.1.el5uek System.map-2.6.18-308.el5
grub System.map-2.6.32-300.10.1.el5uek
initrd-2.6.18-308.el5.img test
initrd-2.6.32-300.10.1.el5uek.img vmlinuz-2.6.18-308.el5
lost+found vmlinuz-2.6.32-300.10.1.el5uek
symvers-2.6.18-308.el5.gz
[root@ocm1 boot]# cd -
/home/oracle
[root@ocm1 oracle]# sh touchfile.sh
[root@ocm1 oracle]# cd -
/boot
[root@ocm1 boot]# cd test
[root@ocm1 test]# ls
1 2 3 4 5 6 7 8 9
3.查看当前/boot目录可用Inodes数量
[root@ocm1 test]# df -i
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/sda3 7318528 185460 7133068 3% /
/dev/sda1 26104 50 26054 1% /boot
tmpfs 128334 1 128333 1% /dev/shm
4.修改脚本，直接将可用Inodes用光
[root@ocm1 boot]# cd /home/oracle/
[root@ocm1 oracle]# vi touchfile.sh
#!/bin/bash
for abc in {10..26110}
do
touch /boot/test/$abc
done
~
"touchfile.sh" 5L, 71C written
5.执行脚本，脚本未执行完，即报错：No space left on device，
事实上此时用df -h可以看到目录下有可用空间，可是因为没有Inodes，已经无法新建文件了，报错为：No space left on device
[root@ocm1 oracle]# sh touchfile.sh
[root@ocm1 oracle]# sh touchfile.sh
touch: cannot touch `/boot/test/26064': No space left on device
touch: cannot touch `/boot/test/26065': No space left on device
………………………………………………
touch: cannot touch `/boot/test/26109': No space left on device
touch: cannot touch `/boot/test/26110': 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 99M 21M 73M 23% /boot
tmpfs 502M 0 502M 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
手动执行创建目录和文件命令报同样错误：
[root@ocm1 oracle]# cd /boot/
[root@ocm1 boot]# mkdir a
mkdir: cannot create directory `a': No space left on device
[root@ocm1 boot]# touch abc
touch: cannot touch `abc': No space left on device