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1.redis和mq的发布订阅存在很大的区别，你还是详细了解一下吧，比如redis的发布订阅不会对发布的信息进行持久化；
2.mq有很多种（Kafka、RabbitMQ、RocketMQ..），每种可能有自己的特性
3.你说的长连接，是指的消费者拉取消息的长连接，还是消费者与服务器心跳的长连接？消费者什么情况下会阻塞呢？