A topic is a category of messages. It is the basic unit for creating and retrieving messages.
A topic consists of multiple queues. A larger number of queues indicates higher consumption concurrency.
A producer sends messages to the server.
Producers in a group send the same type of messages with the same logic.
A consumer obtains messages from the server.
A consumer group contains consumers that have similar retrieval behavior.
Brokers are a cluster of ECSs that process services.
A lightweight registry that stores metadata. Before producing or consuming messages, producers and consumers must obtain metadata from a NameServer.