Cluster & Toobusy - an awesomely scalable node setup

index.js

// Include libraries
var express = require('express');
var cluster = require('cluster');
var toobusy = require('toobusy');

if (cluster.isMaster) {
	var cpus = require("os").cpus();

	console.log("CPU Info:");
	console.log(cpus);

	for (var i = 0; i < cpus.length; i++) {
		cluster.fork();
	}

	console.log("Running master");
} else {
	// Create a new Express application
	var app = express();

	app.use(function(req, res, next) {
		if (toobusy()) res.send(503, "Server melting, sorry :)");
		else next();
	});

	// Add a basic route – index page
	app.get('/', function (req, res) {
		res.send('Hello World from the world of worker ' + cluster.worker.id + '!');
		console.log("Serving from worker " + cluster.worker.id);
	});

	// Bind to a port
	app.listen(3000);

	console.log("Running worker " + cluster.worker.id);
}