Hi Chris,
Thanks very much for correction! I had just installed lam/mpi and i
was relying on the man page for lamboot which didn't mention any of
those.. By the time I realized that man pages weren't all that
uptodate, it was too late as i had sent that message.
Thanks again for correction, much appreciated,
gurhan
On 5/5/06, Christopher Porter <Cporter_at_[hidden]> wrote:
> Gurhan -
>
> I respectfully disagree. Simply read the boot options for LAM and
> you'll see there are several alternatives to rsh/ssh including the tm
> module, globus, and bproc none of which use rsh/ssh connectivity. This
> is detailed in the LAM 7.x user guides.
>
> As to why ssh is not a viable option - it is not a security concern.
> The administrators of the environment wish to deny users direct access
> to computation hosts to force them to use the workload management system
> (LSF in this case). Many people on this list have voiced their
> objections to such a decision, and many times I agree with them, but my
> aquiecense or dissent is immaterial. A "no login" environment is what
> we are faced with.
>
> I hope that makes the question clearer. Thanks very much for thinking
> about it and taking the time to respond.
> chris
>
>
> Christopher N. Porter
> Sr. Systems Engineer
> Platform Computing Inc.
> (714) 665 8225 (work)
> (714) 955 8112 (cell)
> platform_cporter (skype)
>
> -----Original Message-----
> From: lam-bounces_at_[hidden] [mailto:lam-bounces_at_[hidden]] On Behalf
> Of Gurhan Ozen
> Sent: Thursday, May 04, 2006 8:17 PM
> To: General LAM/MPI mailing list
> Subject: Re: LAM: lamboot without rsh/ssh
>
> I don't understand why ssh is not a viable option? The newer versions
> of lam/mpi still requires either SSH or RSH for lamboot to be able to
> work, yes.
>
> If you think ssh will be an option and want to set up ssh between nodes
> so that they can communicate over ssh without passwords, refer to :
> http://www.arches.uga.edu/~pkeck/ssh/ or just look it up at google.
>
> thanks,
> gurhan
>
> > > I'm using an old versions (6.3) of LAM/MPI. In this version of LAM,
>
> > > lamboot uses rsh to run hboot which forks lam demon (lamd). The
> > > problem we are running in to is that rsh is not allowed (for
> > > security reasons) on the cluster of machines connected to LSF. Ssh
> > > also causes problems because it prompts you for the password. I
> > > know there's a way to setup ssh so it doesn't prompt for a password,
> but it is not a viable option.
> > > So, is there a way to fork lam demon without going through lamboot?
> > >
> > >
> > >
> > > I have not kept up with new features of latest release but does the
> > > new version of LAM/MPI still require rsh/ssh to fork lam demon?
> > >
> > >
> > >
> > > Thank You,
> > >
> > > YoungHui
> > >
> > >
> > >
> > > _______________________________________________
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> >
> >
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> >
>
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