charr at lnxi.com
Mon Mar 5 09:09:33 PST 2001
If you could get two duals per 1U, that'd be great density. I must warn
you though of heating issues. Even if you manage to get the logistics of
your idea to work, heat will be a huge concern. So if you can get the
company to drop the computer room to a refrigerator and have the cost
come out of their budget, you may ok.
"Carpenter, Dean" wrote:
> We're just now beginning to mess around with clustering - initial
> proof-of-concept for the local code and so on. So far so good, using spare
> equipment we have lying around, or on eval.
> Next step is to use some "real" hardware, so we can get a sense of the
> throughput benefit. For example, right now it's a mishmosh of hardware
> running on a 3Com Switch 1000, 100m to the head node, and 10m to the slaves.
> The throughput one will be with 100m switched all around, possibly with a
> gig uplink to the head node.
> Based on this, we hunt for money for the production cluster(s) ...
> What hardware are people using ? I've done a lot of poking around at the
> various clusters linked to off beowulf.org, and seen mainly two types :
> 1. Commodity white boxes, perhaps commercial ones - typical desktop type
> cases. These take up a chunk of real estate, and give no more than 2 cpus
> per box. Lots of power supplies, shelf space, noise, space etc etc.
> 2. 1U or 2U rackmount boxes. Better space utilization, still 2 cpus per
> box, but costing a whole lot more $$$.
> We, like most out there I'm sure, are constrained, by money and by space.
> We need to get lots of cpus in as small a space as possible. Lots of 1U
> VA-Linux or SGI boxes would be very cool, but would drain the coffers way
> too quickly. Generic motherboards in clone cases is cheap, but takes up too
> much room.
> So, a colleague and I are working on a cheap and high-density 1U node. So
> far it looks like we'll be able to get two dual-CPU (P3) motherboards per 1U
> chassis, with associated dual-10/100, floppy, CD and one hard drive. And
> one PCI slot. Although it would be nice to have several Ultra160 scsi
> drives in raid, a generic cluster node (for our uses) will work fine with a
> single large UDMA-100 ide drive.
> That's 240 cpus per 60U rack. We're still working on condensed power for
> the rack, to simplify things. Note that I said "for our uses" above. Our
> design goals here are density and $$$. Hence some of the niceties are being
> foresworn - things like hot-swap U160 scsi raid drives, das blinken lights
> up front, etc.
> So, what do you think ? If there's interest, I'll keep you posted on our
> progress. If there's LOTS of interest, we may make a larger production run
> to make these available to others.
> Dean Carpenter
> deano at areyes.com
> dean.carpenter at pharma.com
> dean.carpenter at purduepharma.com
> 94TT :)
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