I think this is too much for a shell and using C or at least some real scripting language may be required here. However I'd love to see a solution for shell if possible.
I tried a perl solution and got really bogged down because I couldn't find an easy way of running a background command (disclaimer: it's a VERY long time since I used perl, but I don't have Python on the box I'm working with :-() Messing round with
seems fraught with potential issues that I don't understand (for a start, it doesn't handle shell metacharacters - should I use exec "sh", "-c", @_ or some similar incantation?)
If someone can confirm a decent Perl equivalent of the shell
I'll see what I can do with the rest of it...
I'm trying to install a solaris 9 patch cluster and when I try to use & to run in background it won't allow me to enter in my sudo password so it fails the install and sudo auth. Does Solaris not have screen like linux? If & will work what am I doing wrong?
sudo ./install_cluster -q &
is... (3 Replies)
I have the following sample script to run a script the jobs with the same
priority(in this case field3) in parallel; wait for the jobs to finish
and run the next set of jobs in parallel.When all the lines are read
exit the script.
I have the following script which is doing evrything I want... (1 Reply)
i need to execute 5 jobs at a time in background and need to get the exit status of all the jobs i wrote small script below , i'm not sure this is right way to do it.any ideas please help.
$cat run_job.ksh
#!/usr/bin/ksh
####################################
typeset -u SCHEMA_NAME=$1
... (1 Reply)
Hi All,
I have requirement. I am running a job every 30mins. before starting the process, i need to check the process, if the process is still running then i need not trigger the process again, if it is not running then trigger the process again. I am using cron to trigger the shell script. Can... (7 Replies)
Hello,
I am a novice shell script programmer. And facing this problem any help is appreciated.
I m writing a shell script and running few commands in it background as I have to run them simultaneously.
Sample code :
sql_prog &
sql_prog &
sql_prog &
echo "Process Completed"
Here... (2 Replies)
Hi,
I have on shell script which internally calls more than one scripts which run in background.
These scripts cannot be modified to run in foreground.
eg. myscript.sh -> bulk_launcher.sh -> acq_launcher.sh
-> bulk_loader.sh
I want the calling shell script myscript.sh to wait till the... (7 Replies)
Hello,
I am running GNU bash, version 3.2.39(1)-release (x86_64-pc-linux-gnu). I have a specific question pertaining to waiting on jobs run in sub-shells, based on the max number of parallel processes I want to allow, and then wait... (1 Reply)
Hi ,
I want to see all the background process that are running in unix box machine...please guide me is there any specific command for that..since I am executing some scripts at background..!!:confused: (1 Reply)
Hi,
I have this simple c program that creates duplicate process with fork():
#include <sys/types.h>
main()
{
if (fork() == 0)
while(1);
else
while(1);
}
I tried running it in the background
gcc -o test first.c
test &
And I got this list of running process: (4 Replies)
Discussion started by: uniran
4 Replies
LEARN ABOUT PLAN9
queuedefs
queuedefs(4) File Formats queuedefs(4)NAME
queuedefs - queue description file for at, batch, and cron
SYNOPSIS
/etc/cron.d/queuedefs
DESCRIPTION
The queuedefs file describes the characteristics of the queues managed by cron(1M). Each non-comment line in this file describes one queue.
The format of the lines are as follows:
q.[njobj][nicen][nwaitw]
The fields in this line are:
q The name of the queue. a is the default queue for jobs started by at(1); b is the default queue for jobs started by batch (see
at(1)); c is the default queue for jobs run from a crontab(1) file.
njob The maximum number of jobs that can be run simultaneously in that queue; if more than njob jobs are ready to run, only the first
njob jobs will be run, and the others will be run as jobs that are currently running terminate. The default value is 100.
nice The nice(1) value to give to all jobs in that queue that are not run with a user ID of super-user. The default value is 2.
nwait The number of seconds to wait before rescheduling a job that was deferred because more than njob jobs were running in that job's
queue, or because the system-wide limit of jobs executing has been reached. The default value is 60.
Lines beginning with # are comments, and are ignored.
EXAMPLES
Example 1: A sample file.
#
#
a.4j1n
b.2j2n90w
This file specifies that the a queue, for at jobs, can have up to 4 jobs running simultaneously; those jobs will be run with a nice value
of 1. As no nwait value was given, if a job cannot be run because too many other jobs are running cron will wait 60 seconds before trying
again to run it.
The b queue, for batch(1) jobs, can have up to 2 jobs running simultaneously; those jobs will be run with a nice(1) value of 2. If a job
cannot be run because too many other jobs are running, cron(1M) will wait 90 seconds before trying again to run it. All other queues can
have up to 100 jobs running simultaneously; they will be run with a nice value of 2, and if a job cannot be run because too many other jobs
are running cron will wait 60 seconds before trying again to run it.
FILES
/etc/cron.d/queuedefs queue description file for at, batch, and cron.
SEE ALSO at(1), crontab(1), nice(1), cron(1M)SunOS 5.10 1 Mar 1994 queuedefs(4)