[Unison-hackers] move instead of copy

[Julian Squires]

I am considering implementing this.

At least in the case of Posix systems, couldn't one rename(2) and if
it fails with EXDEV, then fall back to copy-and-delete?

On Tue, Sep 15, 2015 at 12:51 PM, Trevor Jim <tjim at mac.com> wrote:
> As I recall, the reason for the copy is that sometimes move is not
> atomic.
>
> For example, a move from one hard disk to another is actually a copy and
> a delete.  The copy could fail in the middle.
>
> It is hard to tell how a move will be implemented from just the path of
> source and destination.
>
> Using copy+delete instead of a move is therefore a safer approach, since
> Unison knows that copies can fail and takes this into account so that
> you do not lose data.
>
> Something to keep in mind...
>
> -Trevor
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-- 
Julian Squires