The problem is, I can get more processing power and RAM out of two 10RU blade chassis and only needing 64 10G ports... 32 x 256GB RAM per blade = 8.1TB 32 x 16 cores x 2.4GHz = 1,228GHz (not based on current highest possible, just using reasonable specs) Needing only 4 QFX5100s which will cost less than a populated 6513 and give lower latency. Power, cooling and cost would be lower too. RPi = 900MHz and 1GB RAM. So to equal the two chassis, you'll need: 1228 / 0.9 = 1364 Pis for compute (main performance aspect of a super computer) meaning double the physical space required compared to the chassis option. So yes, infeasible indeed. Regards, Tim Raphael
On 9 May 2015, at 1:24 pm, charles@thefnf.org wrote:
So I just crunched the numbers. How many pies could I cram in a rack?
Check my numbers?
48U rack budget 6513 15U (48-15) = 33U remaining for pie 6513 max of 576 copper ports
Pi dimensions:
3.37 l (5 front to back) 2.21 w (6 wide) 0.83 h 25 per U (rounding down for Ethernet cable space etc) = 825 pi
Cable management and heat would probably kill this before it ever reached completion, but lol...