En utilisant le cluster, donc on va recuperer le nombre de CPU puis creer les fils.
Un truc magic, quand kill un fils , un autre fils va creer automatiquement grace a l'evenement on 'exit'.
const cluster = require('cluster');
const http = require('http');
const numCPUs = require('os').cpus().length;
if (cluster.isMaster) {
console.log('main');
// Fork workers.
for (var i = 0; i < numCPUs; i++) {
cluster.fork();
}
cluster.on('exit', (worker, code, signal) => {
cluster.fork();
console.log(`worker ${worker.process.pid} died `+signal);
});
} else {
// Workers can share any TCP connection
// In this case it is an HTTP server
http.createServer((req, res) => {
res.writeHead(200);
res.end('hello world\n');
}).listen(8080,function(){
console.log('[worker] : '+process.pid);
});
}