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Full Discussion: Scheduling scheduling !!!
Top Forums Shell Programming and Scripting Scheduling scheduling !!! Post 302594460 by Corona688 on Tuesday 31st of January 2012 10:58:39 AM
Old 01-31-2012
You'd put that before /usr/bin/make. Then it will start the ten jobs at parallel at that time, and wait for them all to finish before running whatever command you put in the 'all' rule.
 

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SEM(1)								     parallel								    SEM(1)

NAME
sem - semaphore for executing shell command lines in parallel SYNOPSIS
sem [--fg] [--id <id>] [--timeout <secs>] [-j <num>] [--wait] command DESCRIPTION
GNU sem is an alias for GNU parallel --semaphore. It works as a tool for executing shell commands in parallel. GNU sem acts as a counting semaphore. When GNU sem is called with command it will start the command in the background. When num number of commands are running in the background, GNU sem will wait for one of these to complete before starting another command. Before looking at the options you may want to check out the examples after the list of options. That will give you an idea of what GNU sem is capable of. OPTIONS
command Command to execute. The command may be followed by arguments for the command. --bg Run command in background thus GNU parallel will not wait for completion of the command before exiting. This is the default. See also: --fg -j N Run up to N commands in parallel. Default is 1 thus acting like a mutex. --jobs N -j N --max-procs N -P N Run up to N commands in parallel. Default is 1 thus acting like a mutex. --jobs +N -j +N --max-procs +N -P +N Add N to the number of CPU cores. Run up to this many jobs in parallel. For compute intensive jobs -j +0 is useful as it will run number-of-cpu-cores jobs simultaneously. --jobs -N -j -N --max-procs -N -P -N Subtract N from the number of CPU cores. Run up to this many jobs in parallel. If the evaluated number is less than 1 then 1 will be used. See also --use-cpus-instead-of-cores. --jobs N% -j N% --max-procs N% -P N% Multiply N% with the number of CPU cores. Run up to this many jobs in parallel. If the evaluated number is less than 1 then 1 will be used. See also --use-cpus-instead-of-cores. --jobs procfile -j procfile --max-procs procfile -P procfile Read parameter from file. Use the content of procfile as parameter for -j. E.g. procfile could contain the string 100% or +2 or 10. --semaphorename name --id name Use name as the name of the semaphore. Default is the name of the controlling tty (output from tty). The default normally works as expected when used interactively, but when used in a script name should be set. $$ or my_task_name are often a good value. The semaphore is stored in ~/.parallel/semaphores/ --fg Do not put command in background. --timeout secs (not implemented) -t secs (not implemented) If the semaphore is not released within secs seconds, take it anyway. --wait -w Wait for all commands to complete. EXAMPLE
: Gzipping *.log Run one gzip process per CPU core. Block until a CPU core becomes available. for i in `ls *.log` ; do echo $i sem -j+0 gzip $i ";" echo done done sem --wait EXAMPLE
: Protecting pod2html from itself pod2html creates two files: pod2htmd.tmp and pod2htmi.tmp which it does not clean up. It uses these two files for a short time. But if you run multiple pod2html in parallel (e.g. in a Makefile with make -j) you need to protect pod2html from running twice at the same time. sem running as a mutex will do just that: sem --fg --id pod2html pod2html foo.pod > foo.html sem --fg --id pod2html rm -f pod2htmd.tmp pod2htmi.tmp BUGS
None known. REPORTING BUGS
Report bugs to <bug-parallel@gnu.org>. AUTHOR
Copyright (C) 2010,2011 Ole Tange, http://ole.tange.dk and Free Software Foundation, Inc. LICENSE
Copyright (C) 2010,2011 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or at your option any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. Documentation license I Permission is granted to copy, distribute and/or modify this documentation under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, with no Front-Cover Texts, and with no Back-Cover Texts. A copy of the license is included in the file fdl.txt. Documentation license II You are free: to Share to copy, distribute and transmit the work to Remix to adapt the work Under the following conditions: Attribution You must attribute the work in the manner specified by the author or licensor (but not in any way that suggests that they endorse you or your use of the work). Share Alike If you alter, transform, or build upon this work, you may distribute the resulting work only under the same, similar or a compatible license. With the understanding that: Waiver Any of the above conditions can be waived if you get permission from the copyright holder. Public Domain Where the work or any of its elements is in the public domain under applicable law, that status is in no way affected by the license. Other Rights In no way are any of the following rights affected by the license: o Your fair dealing or fair use rights, or other applicable copyright exceptions and limitations; o The author's moral rights; o Rights other persons may have either in the work itself or in how the work is used, such as publicity or privacy rights. Notice For any reuse or distribution, you must make clear to others the license terms of this work. A copy of the full license is included in the file as cc-by-sa.txt. DEPENDENCIES
GNU sem uses Perl, and the Perl modules Getopt::Long, Symbol, Fcntl. SEE ALSO
parallel(1) 20120422 2011-06-25 SEM(1)
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