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 platform.com> 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-bounceslam-mpi.org [mailto:lam-bounceslam-mpi.org] 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.arch
es.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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