队列和消费组是一对一的关系嘛?
#7701
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消费组是消费者负载均衡组的意思。消费组订阅(subscribe)一个或者多个主题(topic), 从而持有若干队列。隶属于同一个消费组的多个消费者根据消费组的属性(attribute: FIFO, standard,transaction isolation等)分配持有的队列的消息。分配方式支持多种,比如standard 消息按照负载分配,顺序消息按照message group展开后分配,流式消费按照队列绑定和分配。 进一步可以看下网站上核心概念的介绍。 |
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参考下 https://rocketmq.apache.org/zh/docs/4.x/consumer/01concept2 和 https://rocketmq.apache.org/zh/docs/featureBehavior/08consumerloadbalance |
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如果队列和消费组一对一关系
rocketmq队列数大于消费组,是不是就存在有队列的消息没被消费?
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