Node.js Cluster Process Module
Example
Run the code three times, the first time is as a master, then as workers:
var cluster = require('cluster');
if (cluster.isWorker) {
console.log('I am a worker');
} else {
console.log('I am a
master');
cluster.fork();
cluster.fork();
}
Run example »
Defintion and Usage
The cluster module provides a way of creating child processes that runs simultaneously and share the same server port.
Syntax
The syntax for including the cluster module in your application:
var cluster = require('cluster');
Cluster Properties and Methods
| Method | Description |
|---|---|
| disconnect() | Disconnects all workers |
| exitedAfterDisconnect | Returns true if a worker was exited after disconnect, or the kill method |
| fork() | Creates a new worker, from a master |
| id | A unique id for a worker |
| isConnected | Returns true if the worker is connected to its master, otherwise false |
| isDead | Returns true if the worker's process is dead, otherwise false |
| isMaster | Returns true if the current process is master, otherwise false |
| isWorker | Returns true if the current process is worker, otherwise false |
| kill() | Kills the current worker |
| process | Returns the global Child Process |
| schedulingPolicy | Sets or gets the schedulingPolicy |
| send() | sends a message to a master or a worker |
| settings | Returns an object containing the cluster's settings |
| setupMaster() | Changes the settings of a cluster |
| worker | Returns the current worker object |
| workers | Returns all workers of a master |
