Slow copy

[Graham Smith <graham@crazysquirrel.com>]

Hi,

This is perhaps one of the stranger questions to be asked but I'm looking for 
a utility that will copy a file slowly.

Part of my ad hoc backup system is to copy the nightly backup tar file from 
our production machine onto another machine. The problem is that the 
production machine is not exactly what you would call high performance and 
the file copy basically causes everything else to grind to a halt. It doesn't 
matter to me that the copy is done in 5 minutes or 50 minutes what matters is 
that it doesn't kill the server for 5 minutes a day.

What I am basically looking for is a version of cp with a max copy rate 
argument. I would write my own but I can't believe that I'm the only one who 
has ever wanted this feature so I suspect there is one already in existence.

Thanks,

Graham