logserver server.js.

gistfile1.txt

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

if (cluster.isMaster) {
    for (var i = 0; i < numCPUs; i++) {
        cluster.fork();
    }    
    cluster.on('exit', function(worker, code, signal) {
        console.log('worker ' + worker.process.pid + ' died');
    });
    console.log('This platform is ' + process.platform);
    console.log('This processor architecture is ' + process.arch);
    console.log('This process is pid ' + process.pid);
    console.log(process.versions);
    process.argv.forEach(function (val, index, array) {
        console.log(index + ': ' + val);
    });

} else {
    var dgram = require("dgram");
    var server = dgram.createSocket("udp4");

    server.on("message", function (msg, rinfo) {
        var start = process.hrtime();
        var end = process.hrtime(start);
        var total_time = end[0] + (end[1] / 1000000000);
        console.log("server got: " + msg + ' from ' + rinfo.address + ', ' + rinfo.port + '. Time: ' + total_time + "\n");

    });
    server.on("listening", function () {
        var address = server.address();
        console.log("server listening " +
                    address.address + ":" + address.port);
    });
    server.bind(8080);
}