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Full Discussion: nohup & mpiexec problems
Top Forums UNIX for Dummies Questions & Answers nohup & mpiexec problems Post 302412770 by erin85 on Tuesday 13th of April 2010 12:20:58 PM
Old 04-13-2010
nohup & mpiexec problems
Hi everyone -

I'm trying to start a run of LAMMPS (which takes an input file) with mpiexec on multiple processors. I want to combine this with nohup so that I can log off the node. I've used the syntax below successfully on one cluster, but it doesn't work on the new one I'm using. Any suggestions would be helpful.

First, I have a script:
Code:
#!/bin/bash
mpiexec -np 8 /home/foo/lmp_openmpi < /home/foo/inputfile

Now, I call that script with nohup via:
Code:
nohup sh script > nohup.out &

This starts the lammps job just fine, on 8 processors. However, when logging out of the node, the jobs die. Checking the nohup.out, I get the final line:
"mpiexec noticed that process rank 1 with PID 37372 on node whatever exited on signal 1 (Hangup)."

Isn't that what nohup is supposed to be preventing? I've seen the redirecting to /dev/null thing mentioned around the web, but I'm either using it wrong, or it's ineffective. Help!?!
Last edited by vbe; 04-13-2010 at 01:48 PM.. Reason: code tags...
 

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LEARN ABOUT MINIX

nohup

NOHUP(1)                                                           User Commands                                                          NOHUP(1)

NAME

       nohup - run a command immune to hangups, with output to a non-tty

SYNOPSIS

       nohup COMMAND [ARG]...
       nohup OPTION

DESCRIPTION

       Run COMMAND, ignoring hangup signals.

       --help display this help and exit

       --version
              output version information and exit

       If  standard  input  is a terminal, redirect it from an unreadable file.  If standard output is a terminal, append output to 'nohup.out' if
       possible, '$HOME/nohup.out' otherwise.  If standard error is a terminal, redirect it to standard output.   To  save  output  to  FILE,  use
       'nohup COMMAND > FILE'.

       NOTE: your shell may have its own version of nohup, which usually supersedes the version described here.  Please refer to your shell's doc-
       umentation for details about the options it supports.

AUTHOR

       Written by Jim Meyering.

REPORTING BUGS

       GNU coreutils online help: <http://www.gnu.org/software/coreutils/>
       Report nohup translation bugs to <http://translationproject.org/team/>

COPYRIGHT

       Copyright (C) 2017 Free Software Foundation, Inc.  License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
       This is free software: you are free to change and redistribute it.  There is NO WARRANTY, to the extent permitted by law.

SEE ALSO

       Full documentation at: <http://www.gnu.org/software/coreutils/nohup>
       or available locally via: info '(coreutils) nohup invocation'

GNU coreutils 8.28                                                 January 2018                                                           NOHUP(1)
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