A solution to the problem of inodes occupation

Blog Original
Amway an introductory article on the neural network of a foreign Daniel I translated

Recently received a server alarm, inodes use too high, the resolution process is as follows
First, execute the following command on the server to see which directory inodes is using too high

[root@vm]# df-i
Filesystem              inodes  iused     IFree iuse% mounted on
/dev/mapper/vgsys-lv_root
                        655360 101872    553488   16%/
tmpfs                  2041469      1   2041468    1%/dev/shm
/dev/vda1                51200     51162    1%/boot
/dev/mapper/vgsys-lv_var
                        655360 569533     85827   87 %/var
/dev/mapper/vgsys-lv_srv
                     104644608   1727 104642881    1%/srv
/dev/mapper/vgsys-lv_ VFS
                      52428800      7  52428793    1%/srv/docker/vfs
/dev/mapper/vgsys-lv_log
                      31457280    207  31457073    1%/var/log

You can find the maximum use of inodes in the/var directory, and use the following script to find further

[root@vm]# for I in/var/*; do echo $i; Find $i | Wc-l; Done
/var/account
2
/var/cache
98
... /var/spool
587003
/var/tmp
1

By this method, the final discovery is that there are too many small files in the/var/spool/postfix/maildrop directory.
Search by Internet for the following reasons:

Because Linux executes cron, the output and warning information in the script will be sent to the Cron owner in the form of a message, and the  
Mail is sent unsuccessfully because SendMail and postfix in the customer's environment are not working properly , all the small files accumulate under the Maildrop directory 
, and there is no mechanism to automatically clean up the conversion, so this directory accumulates a large number of files

Enter the/var/spool/postfix/maildrop path using LS | Xargs-n RM-RF The document clear and the problem recovered. Fundamental Solutions

Vi/etc/crontab
replace mailto=root with mailto= "" and then service Crond restart. If not crontab-e the first line adds mailto= ""