[Beowulf] 1 multicore machine cluster

Залетнев Дмитрий dzaletnev at yandex.ru
Sat Apr 25 18:58:23 PDT 2009

> Залетнев Дмитрий wrote:
> > > is it possible to have a single multicored machine as a cluster?
> > > 
> > > -- 
> > > Jonathan Aquilina
> > I have a 2-core machine with a lot of memory and GLAN NIC
> PC, yes?

ECS E8400/8(DDR2)/1000+500+250/XFX 8800 GTX 630 MHz/Realtek PCI-Ex1 GLAN

> > and two PS3 with 8 cores each with 256 MB of RAM and slow GLAN network, thanks to PS3's "hypervisor", AIX-based native PS3 system, on witch CentOS-based YDL works under Virtual Machine.
> > I'd like that my 3 machines have common address space. In '95 there was a french project Phosphorus for PVM intended for this goal. 
> > Is there any common-memory module for MPICH2?
> Not that I'm aware, there isn't. I believe MPICH2 has yet to be extended
> for heterogeneous clusters, so if the dual core machine is not PPC and
> binary compatible to the PS3s, it'll have to be used as infrastructure
> only. Further, the SPEs on the Cell are managed quite a bit differently
> than a standard SMP core.
> For this reason, UPC and Titanium (which would be good options for
> symmetric nodes) won't work too well. However, programming the SPEs as a
> single vector processing unit through one of many methods, then fronting
> it with UPC would work. Or, you could shell out some cash for Rapidmind
> and try your luck.
> So, you have some decisions to make. Good luck!
> > I'd like to convert my geterogeneous GLAN with several nodes into single common-memory supercomputer, because my CFD-applications demand a lot of memory. By the way, in june PGI releases compilers with support of GPU programming. They're going to standardize this as it was with OpenMP. And I have nVidia G80 card in my PC.
> You can distribute the data store efficiently if you can distribute the
> compute space efficiently. You might have a problem here, as PS3s don't
> have a lot of RAM.

I might have a problem that network in PS3 works through hypervisor, so really there's 300 Mbit/s max.

> > Dmitry Zaletnev
> FYI - Universal Parallel C, Co-Array Fortran and Titanium are three
> language dialects (C, Fortran, and Java-ish) which are able to abstract
> memory distribution as variable indices within the language.
> -- 
> Geoffrey D. Jacobs

Dmitry Zaletnev

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