NodeJS Cluster

main.js

var cluster = require('cluster'),
    numCPUs = require('os').cpus().length;

if (cluster.isMaster) {
    while (numCPUs-- > 0) cluster.fork();

    cluster.on('exit', function(worker, code, signal) {
        console.log('worker ' + worker.process.pid + ' died');
        cluster.fork();
    });
} else {
    var settings = require(__dirname + '/settings.json');

    require('./app').listen(settings.port);
}