Charging algorithm

The algorithm for calculating the charges is as follows: The total amount to cover the maintenance contract is split, currently in equal parts, among CPU charge, permanent (home) disk charges, and workstation charges. From the available resources of each a cost per units for CPU time, permanent (home) disk space and workstation use is computed.

Pages printed are $.15 per page for color pages on the Dell printers. Color pages on the Lanier are $.25 per page and $1.00 per transparancy and $5.00 per DesignJet 42 inch x 5 feet plot.

Workstations are charged with a rate of $0.00 for desktops.

Disk space is charged at about $15.00 per GB per day.

CPU usage is charged at $1.00 per Peta (10**15) floating point operations performed. The total number of operations used per month is computed per CPU used. Each CPU is rated at the theoretical maximum of floating point operations it can perform per second times the number of seconds the CPU is used.

Processor description	MHz	Float Ops per cycle	Cost per time
1 Simu 4 CPU node	375	4	$.518 per day
1 Quanta 2 CPU node	200	4	$.138 per day
10 Xena II 1 CPU nodes	135	4	$.466 per day
10 Xena I 1 CPU nodes	66	4	$.228 per day
1 Athlon CPU	1700	1	$.146 per day
1 Xeon CPU	2700	1	$.233 per day