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Top Forums Shell Programming and Scripting Help with shell script handling processes Post 302967581 by JackyShane_36 on Thursday 25th of February 2016 06:31:57 AM
Old 02-25-2016
Thanks everyone, but I was looking for something easier. With some more dragging around I found the best way to do it without too much complexity.

Adding the code below for reference.

Code:
 
#!/bin/bash
FILE2=/usr/local/app/command_file.log
while read line; do
command=$(echo $line)
log=$(echo $line | awk -F'"' '{$0=$2}1')
count=$(ps aux | grep -i "tscV6Connector" | grep -v "grep" | wc -l)
instance=$(echo $line | awk -F'"' '{$0=$4}1')
if [ $count -le 6 ];
then 
    echo "Running command for "$log" with name starting with "$instance"...."
    nohup "additional_command_parameters" > /usr/local/app/log/"$log"/"$log_$instance".log &
    sleep 10    #Sleep time for the extraction process.
    now1=$(date +'%d/%m/%Y %X');
    echo -e "*** TSO *** "$now1": Started extraction for MAGIC object type "$log" with name starting "$instance" process PID = "$!""
else 
    now2=$(date +'%d/%m/%Y %X');
    echo -e "*** TSO *** "$now2": Total MQL extraction process reached "$count"....\n*** TSO *** "$now2": waiting for previous process PID "$!" to complete"
    wait $!;    #Main wait statement when count >=7. Once wait is over, run the next command after wait.
    nohup "additional_command_parameters" > /usr/local/app/log/"$log"/"$log_$instance".log &
    sleep 10;    #Sleep time for the last MQL which was waiting before log files.
    now=$(date +'%d/%m/%Y %X');
    echo -e "*** TSO *** "$now3": Started extraction for MAGIC object type "$log" with name starting "$instance" process PID = "$!"\n*** TSO *** "$now3": Total number of extraction MQLs on DB are = "$count"\n"
fi
done < $FILE2

This way when 7th process is trying to start, it waits until 6th is completed and so on .....

A simple logic, works well enough Smilie Smilie Smilie

Experts are welcome to comment.

BR/
JS
 

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MEDIT(1)						      General Commands Manual							  MEDIT(1)

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