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I'd use BrowserUk's approach of having a thread pool and feeding jobs to that pool through a queue. Each thread then returns its results to the main program again through a queue.

You can easily turn your serial program into such a queue-based program after you have a working serial program. You haven't made clear that your existing program already works as a single-threaded program, so I can't give you much working code, but given your vague outline above, I'd use something like this:

#!perl -w use strict; use threads; my $THREADS = 20; my $request = Thread::Queue->new; my $response = Thread::Queue->new; my %dataEntity = ( ... ); # Submit all requests for my $dbname (keys %dataEntity) { $request->enqueue([ $dbname, $dataEntity{ $dbname } ]); }; # Tell each thread that we're done for (1..$THREADS) { $request->enqueue( undef ); }; # Launch our threads for (1..$THREADS) { async(\&getData); }; sub getData { while (my $job = $request->dequeue()) { my ($dbname, $credentials) = @$job; # connect to DB, retrieve information $response->enqueue( "Results from $dbname" ); }; # tell our main thread we're done $response->enqueue( undef ); }; while (my $payload = $response->dequeue or $THREADS--) { print Dumper $payload; };

In reply to Re: Thread Design help by Corion
in thread Thread Design help by perlCrazy

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