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Re: password-less public-key authenticated ssh

by Michael Creel :: Rate this Message:

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calcpage wrote:
Hi All!

I just saw the write-up Pelican HPC got in Linux Pro magazine.  Congrats!  This article reminded me that I've always wanted to get Pelican to work on my cluster but had no luck!
I haven't seen that write-up. I hope it's accurate.

calcpage wrote:
Questions:
(1) Can I get PelicanHPC to work with passwrordles ssh as I already have this setup on 25 AMD Athlon 64bit dualcores?
PelicanHPC sets up a cluster with passwordless ssh, so the short answer is yes. I guess you want the software installed on PelicanHPC to work on your cluster. To get the Octave stuff working on your cluster, you could copy the stuff from  PelicanHPC's /home/user onto your cluster. Then install LAM/MPI on your cluster. Then run "sh setup_econometrics" in the Econometrics subdir. That will compile MPITB against your versions of LAM/MPI and Octave. As long as the Econometrics subdir is on a NFS share, things should work. There are of course many bumps in the road upon which one might trip...

calcpage wrote:
(2) Can I setup a PelicanHPC cluster without using PXE, say by booting all nodes with the CD?  As I understand it, MPI can be set to use ssh....
No, this won't work. That worked with some versions of ParallelKnoppix, but it will not work with PelicanHPC. The nodes must netboot. You might try things out by just using a crossover cable to connect 2 machines, and pull out all the other cables. That way you know for sure that they're isolated, and this will let you at least see how PelicanHPC works.

Cheers, Michael

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