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From: Sven Stork (stork_at_[hidden])
Date: 2007-08-31 04:49:10


On Friday 31 August 2007 09:07, Gleb Natapov wrote:
> On Fri, Aug 31, 2007 at 08:04:00AM +0100, Simon Hammond wrote:
> > 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.
> >
> >
> As workaround you can write application that will bind to all ports that
> are not allowed to be used by MPI before running MPI job.

Another option could be (if that match your policy) to limit the dynamic port
range that is used by your OS. By this all application (unless they ask for
an specific port) will get ports in this limited port range. If so the
following link might be interesting for you:

http://www.ncftp.com/ncftpd/doc/misc/ephemeral_ports.html

-- Sven

> --
> Gleb.
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