On Tue, 10 Apr 2012, Richard wrote:
In article
<Pine.LNX.4.44.1204100945160.17750-100000 at localhost>,
JP Hindin <jplist2008 at kiwigeek.com> writes:
More importantly, unfortunately, every rack needs
an MMSC to fire.
Every rack with nodes, yes?
I have a 4-rack Onyx2 Reality Monster and the only rack with an MMSC
is the rack with the compute nodes. The other 3 racks with graphics
don't have an MMSC.
Half. The Gfx modules definitely don't need the sequencing, beyond
avoiding massive in-rush current popping breakers. When the Gfx modules
come up they display a basic screen and then, when the KTOWNs they're
connected to are powered on, the Gfx module reinitialises anyway. But
flipping on six Gfx modules by hand, and then letting the MMSC handle the
compute nodes is a bit odd, to my mind.
But the Gfx modules (or, rather, the MSCs they contain) are capable of
connecting to the MMSCs. In my setup, each rack is mixed Gfx
module/Compute module, and both upper/lower bays was connected to the
MMSC. I don't know how many racks they usually had connected together,
however.
I'm trying
to put up something w/all these damned SGIs for a joke but it
keeps getting further delayed because of all the freakin' problems I'm
having. I'll get there in the end. Three racks gave me 24 processors the
other day, which blew me away. But I'd sure like to go for 40 (I've got a
couple spare nodeboards).
Please keep us posted as to your progress. I have never had
sufficient power to fire up my Reality Monster and I suspect that the
longer it sits gathering dust, the more little problems I'm
accumulating...
Willdo. Most of the effort was involved in running a new 6-3 line, new
outlets/plugs (mismatching 20A and 30A twistloks combined with
horrifically expensive outlets), and building my own power-strip to allow
me to run so many racks side-by-side.
Now I just need to work out how to say "YOU ARE THE MASTER" and get the
idiotic thing all up with all five racks.
- JP