Task queue is used widely in software development. It is a mechanism to distribute work across threads or machines. It is also a way to coordinate workers to perform tasks. The scenario could be a web application that needs to process a large number of requests, a data pipeline that needs to process a large amount of data or a scheduled job that needs to run periodically. I have used task queues in different languages.

I have a service written with nodejs when I found some requests took too long to process. so I decided to queue up the requests and process them one by one. I used Celery in python projects before, so I was looking for something similar in nodejs. Then I found Bull which is a Redis-based queue for Node. Here are some essential notes that would be helpful if you want to use Bull in your project.