UNIX for Advanced & Expert Users

I want to implement a control mechanism using Shell scripts .The intention is to have controlled number of jobs running in parallel

External process will kickstart 40 jobs in parallel .All the 40 jobs will call the same generic script with different parameter values .But at a time only 2 should run ( In extended version of this i will dynamically change the value say to 5 or 10 ) .

What i tried to implement was , with in the generic script i will create a ctl file (CTL files names are unique with same extension) If the number of CTL files is more than or equal to ( -ge 2) , then i wil sleep the job .Else will run it .The problem is when 40 jobs comes back from sleep at the same time , the chances of two or process taking control is high .How can i restrict it ?

Bumping up posts or double posting is not permitted in these forums.

Please read the rules, which you agreed to when you registered, if you have not already done so.

Proceed here:

https://www.unix.com/shell-programmin...#post302418490

Thank You.

The UNIX and Linux Forums.