Short answer: when traversing networks, unicast.
Look through the mailing list archives -- this stuff has been
discussed before. We have several different algorithms for the
collectives, but they're all based on point-to-point designs; nothing
uses multicast.
On Oct 26, 2005, at 4:59 AM, karima karimaa wrote:
> Hi,
>
> I`d like to know about the nature or the kind of collective
> communications under LAM, are they multicast or unicast
> communications ? when a process makes MPI_Reduce,does it call each
> process one by one ?
> please can you explain me.
> think`s
> Karima.
>
> karima karimaa <karima_ama_at_[hidden]> a écrit :
> Hi,
> I am beginner under linux,
> thinks,
>
> Karima.
>
> --- Nelson Brito a écrit:
> > This is not a question of lam, this is more a shell
> > related problem.
> > You need to add the path for lam on your shell
> > configuration file.
> >
> > nelson
> >
> >
> > karima karimaa wrote:
> > > I am working in a debian Linux, i have installed
> > > lam-7.0.6 from a the source code given at :
> > > http://www.lam-mpi.org/7.1/download.php
> > > the installation succeeded;
> > >
> > > I note that in my machine there is mpich installed
> > >
> > >
> > > so, when I try to launch lamboot I obtains the
> > > following error:
> > >
> > > bash: lamboot: command not found
> > >
> > > Please, can you explain me; or given me a
> > solution.
> > >
> > > thank's.
> > >
> > > Karima.
> > >
> > >
> > >
> > >
> > >
> > >
> > >
> >
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> > --
> > Nelson Brito
> > http://www.fc.up.pt/pessoas/ntbrito
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> >
>
>
>
>
>
>
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