What is the best way to organize a report from RabbitMQ?

Question

Node.js

Good afternoon!
There is such a scheme:

There are 3 back-ends, and 10 main workers who receive tasks and break them into smaller ones.
If it’s clear how to make “large” and “small” workers communicate with each other (RPC), then how to send the percentage of completed work back to the back (red arrow) is a question.
Given that there are several backs, responding via RPC is not an option. Of course, you can write it to the database, but this is an extra load.
Can anyone come across this?

Answer 1

Site in this case, he must go for pies.