Xen Dom0 下判断 DomU 的磁盘使用率

从 xentop 大致可知：CPU%、MEM%、网络、I/O...等
但对于 DomU 磁盘的使用、如：

用了多少 inode、多少空间，还剩多少，是否快爆满、是否应该通知客户升级 Xen 硬盘

这些 xentop 就心有余而力不足啦

[root@Rocky ~]# xentop

这里使用 dumpe2fs 为您排除忧愁哦
虽然不是特别准确、但也不会太离谱了啦

[root@localhost ~]# dumpe2fs -h /dev/xvda1
dumpe2fs 1.39 (29-May-2006)
Filesystem volume name:   /
Last mounted on:          <not available>
Filesystem UUID:          218c169f-a405-4862-afe6-3913c81beb37
Filesystem magic number:  0xEF53
Filesystem revision #:    1 (dynamic)
Filesystem features:      has_journal ext_attr resize_inode dir_index filetype needs_recovery sparse_super large_file
Default mount options:    user_xattr acl
Filesystem state:         clean
Errors behavior:          Continue
Filesystem OS type:       Linux
Inode count:              767232
Block count:              767095
Reserved block count:     38354
Free blocks:              439490
Free inodes:              716246
First block:              0
Block size:               4096
Fragment size:            4096
Reserved GDT blocks:      187
Blocks per group:         32768
Fragments per group:      32768
Inodes per group:         31968
Inode blocks per group:   999
Filesystem created:       Tue Apr  9 01:07:47 2013
Last mount time:          Tue Apr  9 09:44:18 2013
Last write time:          Tue Apr  9 09:44:18 2013
Mount count:              3
Maximum mount count:      -1
Last checked:             Tue Apr  9 01:07:47 2013
Check interval:           0 (<none>)
Reserved blocks uid:      0 (user root)
Reserved blocks gid:      0 (group root)
First inode:              11
Inode size:               128
Journal inode:            8
First orphan inode:       171042
Default directory hash:   tea
Directory Hash Seed:      839d1c07-6fc3-4794-9526-92d5ef94fa19
Journal backup:           inode blocks
Journal size:             64M

从上面的：
Inode count, Block count, Free blocks, Free inodes, Block size
等就可以判断出硬盘的使用率情况