Calatravo> Oh, that's bad, I was achieving over 1000 with a shitty Celeron 3900, one core and 1 GB of allocated RAM.
Also, I've had to decrease slightly the plotting priority so that the GPU mining wouldn't be affected.
ps_jb> What a huge operation! To scale it to that level, do you use a NAS or some dedicated hardware?
An idea of your cost-per-TB?
Plotting solution?
A cheap old AMD x4 845 (quad core with AVX2) will plot at about 8000 nonces / min
If you are going multi drive, use gpupoltter and plot to say 3-4 drives at once...it will take hours to get the correct settings but when you do, you could plot say 8000 nonces / min on each of 4 drives at the same time...
I don't have my old settings (I plotted last lot with cpu) but with R9 270 I think I was plotting 1TB on 3 drives at about 11,000 nonces/min each, so about 3TB every 6 hours...although NVidia has ocl support, if gpu plotting use an AMD card, must better. (remember to use buffered and then optimise - direct is crappy)
J