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Top Forums Shell Programming and Scripting Monitoring processes in parallel and process log file after process exits Post 303003307 by rbatte1 on Tuesday 12th of September 2017 06:19:42 AM
Old 09-12-2017
I think that this might be the wait and following commands. They are all serial, i.e. you wait and then do something for each PID in sequence.

You might need to do something more like this:-

Code:
while read PID OPFILE
do
    (wait $PID ; process_OPFILE $OPFILE ) &
done < pid_pfile.txt              # Read each line of the file in a loop

wait    # Make sure all have completed before continuing to any end of script process.

This would create a watcher for each main process that you want to process the report on afterwards. You can see that I read the two variables from the file at the same time at the start of the loop and you can then use them as you wish. This is just an example. Writing a function for process_OPFILE to keep the code neater if you have a lot to do.

Additionally, I've seen you try a sed of a file writing the output to the same file. Whilst probably no longer required, this will fail because the redirector > will open and empty the file before you have had chance to read it. If you want to update a file like this, try:-
Code:
sed -i "/$DPID/d" pid_pfile.txt



Does this help you?



Robin
 

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PARALLEL-NUKE(1)														  PARALLEL-NUKE(1)

NAME
parallel-nuke - kill a bunch of processes on a set of machines SYNOPSIS
parallel-nuke [OPTIONS] -h hosts.txt pattern DESCRIPTION
pssh provides a number of commands for executing against a group of computers, using SSH. It's most useful for operating on clusters of homogenously-configured hosts. The parallel-nuke command is useful when you want to kill a bunch of processes on a set of machines. OPTIONS
-h --hosts hosts file (each line "host[:port] [user]") -l --user username (OPTIONAL) -p --par max number of parallel threads (OPTIONAL) -o --outdir output directory for stdout files (OPTIONAL) -e --errdir output directory for stderr files (OPTIONAL) -t --timeout timeout (secs) (-1 = no timeout) per host (OPTIONAL) -O --options SSH options (OPTIONAL) -v --verbose turn on warning and diagnostic messages (OPTIONAL) EXAMPLE
For example, suppose you've got a bunch of java processes running on three nodes that you'd like to nuke (let's use the three machines from the pssh example). Here you would do the following: # parallel-nuke -h ips.txt -l irb2 java Success on 128.112.152.122:22 Success on 18.31.0.190:22 Success on 128.232.103.201:22 ENVIRONMENT
All four programs take similar sets of options. All of these options can be set using the following environment variables: o PSSH_HOSTS o PSSH_USER o PSSH_PAR o PSSH_OUTDIR o PSSH_VERBOSE o PSSH_OPTIONS SEE ALSO
parallel-ssh(1), parallel-scp(1), parallel-slurp(1), parallel-rsync(1), ssh(1) AUTHOR
Brent N. Chun <bnc@theether.org> COPYING
Copyright: 2003, 2004, 2005, 2006, 2007 Brent N. Chun NOTES
1. bnc@theether.org mailto:bnc@theether.org 03/30/2009 PARALLEL-NUKE(1)
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