my %nodes = ( 'host1' => { 'hardware' => 'servers', 'community' => "$serverCommunity", }, 'host2' => { 'hardware' => 'servers', 'community' => "$serverCommunity", }, ); my %rrd = ( 'real_trend' => { 'free' => $memAvailReal, 'desc' => 'Physical Memory', }, 'swap_trend' => { 'free' => $memAvailSwap, 'desc' => 'Swap Memory', }, );