空文件Size=6，文件達(dá)到一定數(shù)量Size變?yōu)?096，更多文件按照4096步進(jìn)

[root@localhost tmp]# mkdir 123
[root@localhost tmp]# stat 123 | grep Size
  Size: 6               Blocks: 0          IO Block: 4096   directory

新建1000個(gè)文件后，Size變?yōu)?096*18

# cat new1000file.py
import os
for i in range(1000):
        os.system('touch 123/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%05d'%i)
# python new1000file.py
# stat 123 | grep Size
  Size: 73728           Blocks: 192        IO Block: 4096   directory

# python -c "print 73728/4096"
18

新建2000個(gè)文件后，Size變?yōu)?096*54

# cat new2000file.py
import os
for i in range(2000):
        os.system('touch 123/yxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx%05d'%i)
#python new2000file.py
# stat 123 | grep Size
  Size: 221184          Blocks: 536        IO Block: 4096   directory
# python -c "print 221184/4096"
54

復(fù)制一個(gè)100M的文件到目錄123，結(jié)果該Size無變化

# du -sm  /usr/lib/locale/locale-archive
102     /usr/lib/locale/locale-archive

#cp /usr/lib/locale/locale-archive /tmp/123/
#stat 123 | grep Size
  Size: 221184          Blocks: 536        IO Block: 4096   directory

查看文件數(shù)量最多的目錄

[root@localhost /]# find /  -type d -exec stat {} \;|  grep -e "Size\|File" | xargs -l2 | awk -F' ' '{print $4","$2}' | sort --sort=n  -r | head -n 3
25518080,‘/test/111’
24576,‘/usr/share/man/man8’
20480,‘/usr/share/man/man1’