Re: Rasberry pi - high density

[Hugo Slabbert <hugo () slabnet com>]

> Did I miss anything? Just a quick comparison.

If those numbers are accurate, then it leans towards the NUC rather than 
the Pi, no?

Perf:   1x i5 NUC = 10x Pi
$$:     1x i5 NUC = 10x Pi
Power:  1x i5 NUC = 5x Pi

So...if a single NUC gives you the performance of 10x Pis at the capital 
cost of 10x Pis but uses half the power of 10x Pis and only a single 
Ethernet port, how does the Pi win?

--
Hugo

On Mon 2015-May-11 17:08:43 -0500, Rafael Possamai <rafael () gav ufsc br> wrote:

> Interesting! Knowing a pi costs approximately $35, then you need
> approximately $350 to get near an i5.. The smallest and cheapest desktop
> you can get that would have similar power is the Intel NUC with an i5 that
> goes for approximately $350. Power consumption of a NUC is about 5x that of
> the raspberry pi, but the number of ethernet ports required is 10x less.
> Usually in a datacenter you care much more about power than switch ports,
> so in this case if the overhead of controlling 10x the number of nodes is
> worth it, I'd still consider the raspberry pi. Did I miss anything? Just a
> quick comparison.
>
>
>
> On Mon, May 11, 2015 at 4:40 PM, Michael Thomas <mike () mtcc com> wrote:
>
> > As it turns out, I've been playing around benchmarking things lately using
> > the tried and true
> > UnixBench suite and here are a few numbers that might put this in some
> > perspective:
> >
> > 1) My new Rapsberry pi (4 cores, arm): 406
> > 2) My home i5-like thing (asus 4 cores, 16gb's from last year): 3857
> > 3) AWS c4.xlarge (4 cores, ~8gb's): 3666
> >
> > So you'd need to, uh, wedge about 10 pi's to get one half way modern x86.
> >
> > Mike
> >
> >
> > On 5/11/15 1:37 PM, Clay Fiske wrote:
> >
> > > On May 8, 2015, at 10:24 PM, charles () thefnf org wrote:
> > > > 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…
> > >
> > > This feels like it should be a Friday thread. :)
> > >
> > > If you’re really going for density:
> > >
> > > - At 0.83 inches high you could go 2x per U (depends on your mounting
> > > system and how much space it burns)
> > > - I’d expect you could get at least 7 wide if not 8 with the right
> > > micro-USB power connector
> > > - In most datacenter racks I’ve seen you could get at least 8 deep even
> > > with cable breathing room
> > >
> > > So somewhere between 7x8x2 = 112 and 8x8x2 = 128 per U. And if you get
> > > truly creative about how you stack them you could probably beat that
> > > without too much effort.
> > >
> > > This doesn’t solve for cooling, but I think even at these numbers you
> > > could probably make it work with nice, tight cabling.
> > >
> > >
> > > -c

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