root@compute:/ck# stat delta.qcow2 
  File: ¡®delta.qcow2¡¯
  Size: 15076425728	Blocks: 29445776   IO Block: 4096   regular file
Device: fc00h/64512d	Inode: 261816323   Links: 1
Access: (0644/-rw-r--r--)  Uid: (    0/    root)   Gid: (    0/    root)
Access: 2017-02-13 11:51:06.247532554 +0800
Modify: 2017-02-06 17:55:20.031334225 +0800
Change: 2017-02-14 09:57:30.306435392 +0800
 Birth: -