npm install rackThis is an abstraction layer based on EventEmitter to provide a
simple way of dealing with cluster support added on v0.6 of NodeJS.
npm install rack
var rack = require("rack").create();
rack.on("master-start", function () {
console.log("master starting..");
});
rack.on("worker-start", function () {
console.log("worker starting..");
});
rack.start();