Just to add another way to do this, I have used Parallel::Forkmanager for several scripts that needed to run forked processes. One feature I really appreciate is the ability to limit the number of processes started.
Here is an example from the DOCs for your convienance.
use Parallel::ForkManager;
$pm = new Parallel::ForkManager($MAX_PROCESSES);
foreach $data (@all_data) {
# Forks and returns the pid for the child:
my $pid = $pm->start and next;
... do some work with $data in the child process ...
$pm->finish; # Terminates the child process
}
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