[Beowulf] A simple cluster

Peter St. John peter.st.john at gmail.com
Thu Jun 26 13:45:53 EDT 2008


I recall discussion of the hybrid approach, which I think most of the list
doesn't much like, but interested me on account of my application. But I
hadn't realized that hybrid was required by OpenMP for multi node
architectures. So yeah, I'll just go with MPI for starters. When I start :-)
Peter

On 6/26/08, Geoff Jacobs <gdjacobs at gmail.com> wrote:
>
> Peter St. John wrote:
> > Geoff,
> > Oops! I totally misunderstood it. So it's strictly shared-memory, and
> > requires something like MPI for crossing nodes. Gotcha. Big mistake,
> thanks.
> > Peter
>
>
> Shared memory only, yes. Many, many people skip OpenMP completely and go
> pure MPI. From a coding standpoint it's far easier to multiprocess using
> one technique rather than two, and the performance gains for using both
> tend to be marginal or non-existent -- at least in my experience.
>
> There was a long discussion a while back on the list about the pros and
> cons of each approach.
>

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