[rescue] SGI files Ch11 again, bought by Rackable for $25M

[Brian Roth]

Each rack has two modules. If the modules are full of node boards, which they were, then they can have up to 12 XIO interfaces. The SGI HIPPI interfaces were XIO therefor allowing theoretically 24 HIPPI ports per rack. The Meta Router between each series of 4 racks contained 8 router meta boards that connected with the individual rack router boards which there are two in the each module and were all NUMA not HIPPI. 

--- On Wed, 4/1/09, jodys at helluin.org <jodys at helluin.org> wrote:
From: jodys at helluin.org <jodys at helluin.org>
Subject: Re: [rescue] SGI files Ch11 again, bought by Rackable for $25M
To: "The Rescue List" <rescue at sunhelp.org>
Date: Wednesday, April 1, 2009, 2:51 PM

On Wed, Apr 01, 2009 at 02:25:06PM -0400, Joshua Boyd wrote:
> > When I came on, I was mostly handling software and OS stuff so I
didn't have
> > my hands inside the machines too often.  I do remember seeing the
thick
> > cables though and having to work around them.  One "router
rack" with 4
> > O2000 racks on each side with the heavy HIPPI cable interconnects. 
So 9
> > racks total per row, times 48 rows deep.   LOTS of cable.
> 
> The Blue Mountain press release states 48 128 processor systems.
> Pictures clearly show that the center rack is the NUMAlink meta router,
> needed to expand a O2k past 32 processors up to 128 processors.  
> 
> What the press release doesn't specify is how the 48 systems were
> connected together, which I'm going to guess was either HIPPI-800 or
> HIPPI-6400.  The inter-machine speeds that the press release mention
> (650 gigabit) would require one HIPPI-6400 card per cage (2 cages per
> rack) to be in that ball park.

The flyer I found says [0]

Each of the 48 machines has 12 HIPPI ports, connected via a 3-dimensional  
toroidal interconnect using 36 HiPPI-800 16 port switches.

[0] http://www.futuretech.blinkenlights.nl/origin/ASCI_fly.pdf

Jody
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