[Developers] disk space usage reporting

[Frank Loeffler]

Hi,

Steve White wrote:
> I have in mind:  if Cactus could calculate and sum up how much data it
> writes in each iteration (and perhaps compare that to remaining storage
> space, and estimate how quickly it will fill it),

While this is a very nice idea, it already fails with two jobs writing 
to the same disc. Each would estimate more time to fillup than one 
really has.

Even if it would work, it assumes users who watch to the output of this.

Frank