If you don't use queues, you might just not know how to do it right. But before learning about queues, it is necessary to figure out what they are in general and where they are applied. For most systems, it is enough to process 10,000 or fewer requests per second, which any broker can provide. If you need more, you'll have to dive deep into the queues.
This article discusses what queues are, why they are needed, and how they work. I'll base my explanations on several use cases and describe a variety of solutions. I'll outline the most common problems and how to avoid them. We'll also cover the differences between brokers, their pros and cons, and find out what's best for your purposes.
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