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From: Simon Hammond (simon.hammond_at_[hidden])
Date: 2007-08-31 03:04:00


On 31/08/2007, Lev Givon <lev_at_[hidden]> wrote:
> Received from George Bosilca on Thu, Aug 30, 2007 at 07:42:52PM EDT:
> > I have a patch for this, but I never felt a real need for it, so I
> > never push it in the trunk. I'm not completely convinced that we need
> > it, except in some really strange situations (read grid). Why do you
> > need a port range ? For avoiding firewalls ?

We are planning on using OpenMPI as the basis for running MPI jobs
across a series of workstations overnight. The workstations are locked
down so that only a small number of ports are available for use. If we
try to use anything else its disaster.

Unfortunately this is really an organizational policy above anything
else and its very difficult to get it to change.

Si Hammond
University of Warwick

> >
> > Thanks,
> > george.
>
> I imagine that allowing for more security-conscious firewall
> configurations would be the main motivation (although I suspect that
> there are more folks who run MPI on tightly coupled clusters linked by
> a secure/private network than on grids of machines spread across an
> insecure network).
>
> L.G.
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