Cluster mode example

clusterMode.js

/* This code utilizes the “cluster” module to create multiple worker processes, 
 * each handling incoming requests. This approach allows you to scale your 
 * application horizontally to handle increased traffic. Note that they all use
 * the same port.
 */
const cluster = require('cluster');

if (cluster.isMaster) {
    // Master process forks worker processes
    for (let i = 0; i < numCPUs; i++) {
        cluster.fork();
    }
} else {
    // Worker process handles incoming requests
    const server = http.createServer((req, res) => {
        // ...
    });
    server.listen(PORT, () => {
        console.log(`Worker process listening on port ${PORT}`);
    });
}