[Beowulf] The Walmart Compute Node?

Peter St. John peter.st.john at gmail.com
Thu Nov 8 16:04:19 EST 2007


Doug,
Thanks. I visited Clustermonkey before I came here. There's just too
much good stuff.
There was discussion previously, I think, maybe elsewhere, about the
NIC card offloading some work from the CPU, as opposed to on-board
ethernet...which is what you mean in the case of getting nics for the
PCIe slot "vs 32 PCI"...oh you mean PCIe card as opposed to PCI card,
not as opposed to the onboard connection. These walmart things have
one connection on board, is that worth replacing with a card?
Thanks,
Peter

On Nov 8, 2007 3:36 PM, Douglas Eadline <deadline at eadline.org> wrote:
> Peter,
>
> Having some experience with low cost hardware, If you are
> doing number crunching multi-core seems to provide the
> best bang for buck. The following is the HPL performance that
> you can get for $2500. The Kronos and Microwulf clusters
> are detailed on http://clustermonkey.net, Norbert is the subject
> of a November Linux Magazine article.
>
>                                         CPU
> Cluster Name                  Clock      Release           HPL
>   Processor               Speed (MHz)   Date         Performance
> ---------------------------------------------------------------------
> Kronos/Sempron 2500+ (8)        1750   7/2004    14.90 GFLOPS (Atlas)
> Microwulf/Athlon64 X2 3800+ (4) 2000   8/2005    26.25 GFLOPS (Goto)
> Norbert/Core Duo E6550 (4)      2333   7/2007    45.55 GFLOPS (Goto)
>
>
> If you draw a line (3 points I know) you get to 80 GFLOPS
> by 2010. Actually with some tweaking I got Norbert
> up to 47.7 HPL GFLOPS. And, notice I qaulify the performance
> as "HPL GFLOPS" as YMMV.
>
> With really low cost systems one important aspect is the
> interconnect. The PCIe buses on low end motherboards allows
> one to use inexpensive PCIe (Intel) Ethernet cards vs
> 32 PCI. Some of the on-board GigE implementations are
> not very good.
>
> --
> Doug
>
>
>
>
>
> > Recently, probably you noticed, Walmart began selling a $200 linux PC.
> > (Apparently the OS is just Ubuntu 7.10 with a small xindow manager
> > instead of Gnome or KDE). Now Slashdot points to
> > http://www.linuxdevices.com/news/NS5305482907.html, the MB being sold
> > separately for $60 ("development board"). It has 1.5GHz CPU,
> > unpopulated memory (slots for 2GB), one 10/100 connection. Does this
> > look to y'all like fair FLOPS/$ for a kitchen project? I'm thinking 6
> > of them as compute nodes per 8 port router, with a bigger head node
> > for fileserving. (actually I'll use a spare room but you know what I
> > mean). An arrangement like this might be faster RAM access per core,
> > compared to multicore, since each core has no competition for is't own
> > memory, right?
> > Thanks,
> > Peter
> > _______________________________________________
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> >
> > 
> >
>
>
> --
> Doug
>
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