Re: Rasberry pi - high density

[Tim Raphael <raphael.timothy () gmail com>]

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...