JAVASCRIPT

NodeJS Multi-Core Processors Example

const cluster = require('cluster')

if (cluster.isMaster) {
  // Creates the Forks
  process.title = 'my-node-app-master'
  const { length: numberOfProcs } = require('os').cpus()
  for (let i = 0; i < numberOfProcs; i++) {
    cluster.fork()
  }

  // and here you can fork again when one of the forks dies
  cluster.on('exit', (worker, code, signal) => {
    console.error(`worker ${worker.process.pid} died (${signal || code}). restarting it in a sec`)
    setTimeout(() => cluster.fork(), 1000)
  })
} else {
  // run your server
  const http = require('http')
  process.title = 'my-node-app-fork'

  http.Server((req, res) => {
    res.writeHead(200)
    res.end(`hello world from pid ${process.pid}
`)
  }).listen(8000)
}