I need to query the wisdom of the perl monks...

I've got a script which I switched over to Parallel::ForkManager yesterday and after a flawless start I begin to see where the little troubles are.

I am using a "global" hash to store some data. As long as the for loop was kept inside the script on runtime everything went normal. But as soon as I used the ForkManager, each loop is its own entity (as I understand it) and the test for exist of certain keys always fails. Is that observation true?

How am I able to let a (detached/forked) sub access data from the initiating parent process/script. (Maybe its just a bug I missed and it should work out of the box...) Or is my only chance to implement a simple communication system. Any hints for that? Modules, tips?

my %hash = (test => 1);
my %otherhash;

  use Parallel::ForkManager;
  my $pm =  new Parallel::ForkManager(5);
    for(1..10000){
        my $pid = $pm->start() and next;

        # some operations involving waiting etc.

        if(exists($hash{test}){
            # this exist test always fails!
        }

        # write some data to otherhash
        $otherhash{test} = 123;

        $pm->finish();
    }

    # the data 123 never arrives here...:
    print $otherhash{test};

...
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