Node.js集群模块困境

Question

I understand what scaling is and what the node.js cluster module is supposed to do by taking advantage of the remaining cores to improve concurrency.

But here is my question: If I have a certain function to run at, lets say 6pm daily, how do I prevent all 8 workers from running the function 8 times at 6pm instead of once?

Answer 1

You can set an interval in master process and pick a random worker to do the job every time. You can use worker.send(message) function to let the worker know about the new task.

Another way is to prepare an API method that your app exposes. This method will trigger task execution when received. To call this API method, you can use a regular cron. That way, your app will be aware of the work it does, but not of the schedule.