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

	worker1[label="worker"];
	worker2[label="worker"];
	mgr[label="manager"];
	sock[label="transport socket"];
	sock1[label="socket"];
	sock2[label="socket"];
	server[label="web server"];

	mgr -> worker1[label="spawn (4)"; style="dashed"];
	mgr -> worker2[label="spawn (5)"; style="dashed"];
	mgr -> sock[label="listen (3)"; style="dashed"];
	mgr -> sock1[label="bind (1)"; style="dashed"];
	mgr -> sock2[label="bind (2)"; style="dashed"];

	server -> sock[label="FastCGI (6)"];
	sock -> sock1[label="FastCGI (7)"];
	sock -> sock2[label="FastCGI (8)"];
	sock1 -> worker1[label="FastCGI (9)"];
	sock2 -> worker2[label="FastCGI (10)"];
}