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Full Discussion: Implement parallel processing
Top Forums Shell Programming and Scripting Implement parallel processing Post 302834561 by wisecracker on Friday 19th of July 2013 08:56:48 AM
Old 07-19-2013
First of all have some sensible logic.

It is not possible to launch many programs SIMULTANEOUSLY from a single Terminal!

However with VERY small increments in time one can launch as many copies of similar or differing scripts and hope that the OS multi(tasking/threading) takes care of the rest.

Starter example:-

Code:
#!/bin/bash
xterm -e /full/path/to/somescript.sh &
xterm -e /full/path/to/some_other_script.sh &
# NOTE the "&" character! Google is your friend here.
x=0
while true
do
        echo "Doing a loop number, $x here..."
        x=$[ ( $x + 1 ) ]
done

This will launch "somescript.sh" in a separate terminal window and "some_other_script.sh" in another terminal window whilst carrying on with its own work!

There is a caveat to this method but I suspect you'll never come across it...
Last edited by wisecracker; 07-19-2013 at 10:21 AM.. Reason: Typos
 

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LEARN ABOUT SUSE

ivman-launch

IVMAN-LAUNCH(8) 					      System Manager's Manual						   IVMAN-LAUNCH(8)

NAME

       ivman-launch - launch script for Ivman

SYNOPSIS

       ivman-launch [ --exit-with-session <cmd> ] [ OPTIONS ] [ COMMAND [ ARGS... ]]

DESCRIPTION

       ivman-launch  is a simple script used to launch Ivman.  Its sole purpose is to ensure Ivman is closed at the end of a user's login session.
       You can use it if your session manager does not properly close Ivman when you log out.

       ivman-launch supports the same command-line options as Ivman, and one additional option: --exit-with-session.   Thus,  there  is  no  point
       using ivman-launch if you do not need to use this option.

       If  you supply a COMMAND (with optional ARGS), the the specified command will be run after ivman is started, and ivman will be killed after
       that command exits.

OPTIONS

       --exit-with-session <cmd>
	      ivman-launch will block until the command 'cmd' terminates, at which point it will kill Ivman and exit itself.  If the command 'cmd'
	      is  not  running when ivman-launch is started, Ivman will exit immediately.  Note that this option implies Ivman will be called with
	      the '--nofork' option.  option.

       --debug --nofork --system
	      These flags be passed to the launched ivman command.

EXAMPLES

       ivman-launch --exit-with-session xinit &
	      The ivman process will be started, then the xinit process is watched.  When the xinit process exits, ivman is killed.  Placing  this
	      command  in  an  ~/.xinitrc  file would cause Ivman to launch in the background when your session begins, and exit when your session
	      ends:

       ivman-launch /usr/bin/x-window-manager
	      The ivman process is launched, then /usr/bin/x-window-manager is run, when x-window-manager exits, ivman	is  killed.   This  is	an
	      example of how ivman might be launched from Xsession in order to chain several programs together in one session.

SEE ALSO

       ivman(8) Xsession(5)

CREDITS

       This script was written by Daniele Favara.

								 10 February 2006						   IVMAN-LAUNCH(8)
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