Could you please explain specific cases when Child Processes is used in node.js?

Question

Node.js

Cluster, is that what it is?
It would be desirable to understand concrete cases when it is necessary and for what. With code examples, or projects on github.

Answer 1

Any case where you need to run some external program. For example, you received an image and want to process it with some imagemagick.
It can be any other program in the OS - and launching another process in a node is essentially no different from that in python / php / c and so on.
Cluster is different.
code examples can be found through a couple of million searches: https://github.com/search?l=JavaScript&q=require%2...