Re: How to setup RSHD and start it for use with MPICH

From: Cameron Kerr (cameron.kerr_at_paradise.net.nz)
Date: 02/02/04

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    Date: 2 Feb 2004 17:19:21 +1300

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    In comp.os.linux.networking Rene Girard <aa@bb.yy> wrote:

    > mpirun -np 1 ./t_mpi1 (-np is for the number of processors)
    >
    > I should get the following answer:
    >
    > First MPI program
    > [t_mpi1]: I am 0 of 1
    > Success !: First MPI program
    >
    > meaning I am processor no. "0" of one processor
    >
    > however, I get
    >
    > First MPI program
    > [t_mpi1]: I am 0 of 0 <--- Note the "0" instead of the one.
    > Success !: First MPI program.

    That would indicate to me that it seems to think it's only configured
    with 0 processes. I think rsh may not be your problem.

    To verify, try the following.

    Have a look in /var/log/syslog and /var/log/messages. There should be an
    entry in there for every rsh connection that is accepted, and the
    command that was run.

    Now, what does your /etc/mpich/machines.LINUX file say? (Yours might not
    be called exactly that). Mine says something like the following (Note,
    I admin a network that some people use for cluster stuff, but I don't
    really know much about MPICH.

    csatm1
    csatm2
    csatm3
    csatm4
    csatm5
    csatm6
    csatm7
    csatm8

    For a total of eight processes.

    > Content of file "/etc/hosts"
    >
    > # /etc/hosts - hostname_to_address mappings for the resolver library

    > # LISA or COAS will automatically put the hostname in the right line
    > # for you.
    > # !!! Automatically generated by lizard. Do not edit !!!

    > 10.162.211.74 rene.renelinux.net .renelinux.net

    That doesn't look good, you should fix that. The last bit should just
    say "rene".

    > # hosts.deny This file describes the names of the hosts which are

    > swat:ALL EXCEPT 127.0.0.1

    You should normally have ALL:ALL in here, but you can fix that later. 

    -- 
Cameron Kerr
cameron.kerr@paradise.net.nz : http://nzgeeks.org/cameron/
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