expresscluster.js

expresscluster.js

var cluster = require('cluster');

if(cluster.isMaster) {
    var numWorkers = require('os').cpus().length;

    console.log('Master cluster setting up ' + numWorkers + ' workers...');

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

    cluster.on('online', function(worker) {
        console.log('Worker ' + worker.process.pid + ' is online');
    });

    cluster.on('exit', function(worker, code, signal) {
        console.log('Worker ' + worker.process.pid + ' died with code: ' + code + ', and signal: ' + signal);
        console.log('Starting a new worker');
        cluster.fork();
    });
} else {
    var app = require('express')();
   
app.get('/a', function (req, res) {
//ab -n 100000 -c 100 http://localhost:3000/a
  res.send('Hello World!');
});
    var server = app.listen(8000, function() {
        console.log('Process ' + process.pid + ' is listening to all incoming requests');
    });
}