Copy file , file blocks is different

[Dave Chinner]

On Thu, Jan 24, 2013 at 05:48:25PM +0800, Homer Li wrote:
> Hello,
> 
>      There are 2 file in the xfs device,  md5 is the same,  but the size is
> different.
>       I don't know why .......

Speculative preallocation. Google "XFS NFS speculative
preallocation" - I've explained it plenty of times on this list  and
don't need to do it again.

Cheers,

Dave.
-- 
Dave Chinner
david at fromorbit.com