digraph {
	rankdir="LR";
	bgcolor="transparent";

	worker1[label="worker"];
	worker2[label="worker"];
	mgr[label="manager"];
	sock[label="transport socket"];
	server[label="web server"];

	mgr -> worker1[label="spawn (3)"; style="dashed"];
	mgr -> worker2[label="spawn (2)"; style="dashed"];
	mgr -> sock[label="listen (1)"; style="dashed"];

	server -> sock[label="FastCGI (4)"];
	sock -> worker1[label="FastCGI (5)"];
	sock -> worker2[label="FastCGI (6)"];
}