Re: BTRFS file clone support for cp

[Jim Meyering]

Ric Wheeler wrote:
> I think that doing reflink by default would be a horrible idea - one
> good reason to copy a file is to increase your level of fault
> tolerance and reflink magically avoids that :-)

Good point.
This would constitute another user-visible semantic change in cp:
a disk fault that affects any non-metadata block of a ref-linked file
affects both copies.

GNU cp will soon attempt this only when a --reflink option is specified.