The ABINIT Users Mailing List ( CLOSED )

["Anglade Pierre-Matthieu" <anglade@gmail.com>]

Without much knowledges about your systems, I would say that
with 4GB per core you'll get 32GB (right ?) per node which seems
enough for most calculations. Especially considering the "slow" memory
interface of intel 5000 (when doing big computation you'll probably
use effectively only two cores per cpu). Unless your systems are going
to be extremely big your most likely safe with this amount.

The best for you is to try to evaluate the amount of memory you are
going to use. For instance by doing the same kind of calculation but
unconverged... And then scale the memory use with the ratio of your
converged calculation.


On 8/18/07, Xiulin Ruan <ruan@purdue.edu> wrote:
> Thanks a lot for the information. Also, what is the proper amount of memory
> per core? Is 4GB good enough?
>
> Thanks,
>
> Xiulin
>
> > -----Original Message-----
> > From: Anglade Pierre-Matthieu [mailto:anglade@gmail.com]
> > Sent: Friday, August 17, 2007 3:41 PM
> > To: forum@abinit.org
> > Subject: Re: [abinit-forum] computer cluster for parallel computing
> >
> > Hi,
> >
> > Two partial answers for your question:
> > - I have never done any benchmarking but infiniband works very well
> > for Abinit on "lemaitre" the super computer of the CISM
> > - You will find a detailed performance analysis by Torsten Hoefler
> > with two different kinds of interconnection here :
> > www.unixer.de/publications/img/hoefler-sfb05.pdf
> > This might be usefull for your decision.
> >
> > Regards
> >
> > PMA
> >
> > On 8/17/07, Xiulin Ruan <ruan@purdue.edu> wrote:
> > > Dear all,
> > >
> > > We are building a computer cluster to run abinit in the parallel mode.
> > We
> > > are gonna have two or four nodes, and each node will be dual-processor,
> > > quad-core. We wonder if the high speed InfiniBand connection is worthy
> > to
> > > have. Our current jobs include calculating band structure and optical
> > > properties of carbon nanotubes and TiO2. Any suggestions?
> > >
> > > Many thanks,
> > >
> > > Xiulin
> > >
> > >
> >
> >
> > --
> > Pierre-Matthieu Anglade
>
>


-- 
Pierre-Matthieu Anglade