Hi, i am loading 2x3M tuples into two hash tables and have to compare them after some rulez. Problem is that the size of the hash tables in memory are about 600MB. Since the machine i have to run the program on has only 512MB installed. i was thinking about storing the stuff on disk and work from there. Can you tell me how this would be possible 
            my $recordsize=160;
            my ( $portingID, $cli );
            
            print "${INFO}building hash table\t\t - '$infile'\n";
            until( eof(IN) ){
                read(IN, my $data, $recordsize) == $recordsize
                $cli      =substr($data, 0,9);
                $portingID=substr($data,30,6);
    
                $old_tab{ $cli } = $portingID if $filenum==1;
                $new_tab{ $cli } = $portingID if $filenum==2;
                $actld++;
             }
            close IN;

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In reply to How store a hash table on disk and work with it by ReneB

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