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startpar(8)

Jun 2003

startpar

run processes in parallel and multiplex their output

sysvinit-tools

Tools used for process and utmp management.

NAME

startpar - start runlevel scripts in parallel

SYNOPSIS

startpar [-p par] [-i iorate] [-e etcdir] [-t timeout] [-T global_timeout] [-a arg] prg1 prg2 ...
startpar [-p par] [-i iorate] [-t timeout] [-T global_timeout] -M [ boot|start|stop]
startpar [-f]

DESCRIPTION

startpar is used to run multiple run-level scripts in parallel. The degree of parallelism on one CPU can be set with the -p option, the default is full parallelism. An argument to all of the scripts can be provided with the -a option. Processes blocked by pending I/O will cause new process creation to be weighted by the iorate factor 800. To change this factor the option -i can be used to specify another value. The amount weight=(nblockedtimesiorate)/1000 will be subtracted from the total number of processes which could be started, where nblocked is the number of processes currently blocked by pending I/O.
The output of each script is buffered and written when the script exits, so output lines of different scripts won’t mix. You can modify this behaviour by setting a timeout.
The timeout set with the -t option is used as buffer timeout. If the output buffer of a script is not empty and the last output was timeout seconds ago, startpar will flush the buffer.
The -T option timeout works more globally. If no output is printed for more than global_timeout seconds, startpar will flush the buffer of the script with the oldest output. Afterwards it will only print output of this script until it is finished.
The -M option switches startpar into a make(1) like behaviour. This option takes three different arguments: boot, start, and stop for reading .depend.boot or .depend.start or .depend.stop respectively in the directory /etc/init.d/. By scanning the boot and runlevel directories in /etc/rcX.d/ it then executes the appropriate scripts in parallel.
The -e option allows the user to set the location of the system’s etc configuration directory. The default is to use /etc. Using -e we can use alternative locations such as /usr/local/etc.
The -f option causes startpar to copy standard input (stdin) to standard output (stdout) until startpar reaches the end of input or the process is killed. When -f is used no programs are started and other parameters on the command line are ignored. This option is only kept for legacy purposes.

FILES

/etc/init.d/.depend.boot
/etc/init.d/.depend.start
/etc/init.d/.depend.stop

COPYRIGHT

2003,2004 SuSE Linux AG, Nuernberg, Germany.
2007 SuSE LINUX Products GmbH, Nuernberg, Germany.
2018 Jesse Smith

AUTHOR

Michael Schroeder <>
Takashi Iwai <>
Werner Fink <>
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