[179893] in North American Network Operators' Group
Re: Rasberry pi - high density
daemon@ATHENA.MIT.EDU (Dave Taht)
Mon May 11 16:52:36 2015
X-Original-To: nanog@nanog.org
In-Reply-To: <F9D6D515-0389-44A7-9889-F621420A5F60@bloomcounty.org>
Date: Mon, 11 May 2015 13:52:32 -0700
From: Dave Taht <dave.taht@gmail.com>
To: Clay Fiske <clay@bloomcounty.org>
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces@nanog.org
On Mon, May 11, 2015 at 1:37 PM, Clay Fiske <clay@bloomcounty.org> 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) =3D 825 pi
The parallella board is about the same size and has interesting
properties all by itself.
In addition to ethernet it also brings out a lot of pins.
http://www.adapteva.com/parallella-board/
there are also various and sundry quad core arm boards in the same form fac=
tor.
>> Cable management and heat would probably kill this before it ever reache=
d completion, but lol=E2=80=A6
>
>
> This feels like it should be a Friday thread. :)
>
> If you=E2=80=99re really going for density:
>
> - At 0.83 inches high you could go 2x per U (depends on your mounting sys=
tem and how much space it burns)
> - I=E2=80=99d expect you could get at least 7 wide if not 8 with the righ=
t micro-USB power connector
> - In most datacenter racks I=E2=80=99ve seen you could get at least 8 dee=
p even with cable breathing room
>
> So somewhere between 7x8x2 =3D 112 and 8x8x2 =3D 128 per U. And if you ge=
t truly creative about how you stack them you could probably beat that with=
out too much effort.
>
> This doesn=E2=80=99t solve for cooling, but I think even at these numbers=
you could probably make it work with nice, tight cabling.
Dip them all in a vat of oil.
--=20
Dave T=C3=A4ht
Open Networking needs **Open Hardware**
https://plus.google.com/u/0/+EricRaymond/posts/JqxCe2pFr67
