消息队列RocketMQ版概念-阿里云

分布式消息队列RocketMQ概念详解

1.MQ概述1.1 RocketMQ简介RocketMQ 是阿里开源的分布式消息中间件，跟其它中间件相比，RocketMQ 的特点是纯JAVA实现，是一套提供了消息生产，存储，消费全过程API的软件系统。1.2 MQ用途限流削峰MQ可以将系统的超量请求暂存其中，以便系统后期可以慢慢进行处理，从而避免...

RocketMQ 重试机制的概念与最佳实践｜学习笔记

开发者学堂课程【消息队列 RocketMQ 5.0 云原生架构升级课程：RocketMQ 重试机制的概念与最佳实践】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/1234/detail/18397Ro...

RocketMQ的概念与特性

1 消息模型（Message Model）RocketMQ主要由 Producer、Broker、Consumer 三部分组成，其中Producer 负责生产消息，Consumer 负责消费消息，Broker 负责存储消息。Broker 在实际部署过程中对应一台服务器，每个 Broker 可以存储多...

RocketMQ 核心架构和概念|学习笔记

开发者学堂课程【全面讲解 Spring Cloud Alibaba 技术栈（知识精讲+项目实战）第四阶段：RocketMQ 核心架构和概念】学习笔记，与课程紧密联系，让用户快速学习知识。课程地址：https://developer.aliyun.com/learning/course/686/det...

RocketMq名词概念

还有一些名词概念如：主题（Topic），分组（Group），消息队列（Message Queue）,偏移量（Offset），标签（Tag）等2.2.1、Topic 主题我们可以通过topic区标识一类消息，可以将消息分为不同主题。例如Topic A、Tocpic B等。在实际应用中可能会分为家电、衣...

RocketMQ概念详细之NameServer

在Apache RocketMQ，域名服务器被设计为协调分布式系统的每个组件，协调主要通过管理主题路由信息来实现。管理由两部分组成： Broker定期更新保存在每一个NameServer中的元数据 NameServer为客户端提供服务，包括生产者，消费者和带有最新路由信息的命令行客户端。因此，...

RocketMQ概念详细之Consumer

消费者组和订阅首先你应该关心的是不同的消费者群组可以独立的消费相同的主题，并且每个组都拥有自己的消费偏移量。请确保相同消费者内的每个消费者订阅一样的主题。消息监听器串行消费者将锁定每个消息队列以确保它被顺序消费。这会引起性能丢失，但当你关心消息顺序的实时这是很有用的。不推荐抛异常，你可以用返回...

RocketMQ概念详细之Producer

发送状态当你发送一个消息，你将会获得包含SendStatus的SendResult。首先，我们假设消息 isWaitStoreMsgOK=true（默认true）。如果没有，我们会得到 SEND_OK，没有异常抛出的话。下面是每个状态的描述列表： FLUSH_DISK_TIMEOUT 如果brok...

RocketMQ概念详细之broker

生产者角色 Broker的角色有ASYNC_MASTER，SYNC_MASTER 或SLAVE。如果不能容忍消息丢失，我们建议你部署SYNC_MASTER并为其附加SLAVE。如果消息丢失影响不大，但需要Broker一直可用，你可以使用SLAVE部署ASYNC_MASTER。如果仅想简单，你可能只需...

rocketMq概念介绍

rocketMq官网 http://rocketmq.apache.org/ rocketMq逻辑概念介绍 rocketMq逻辑图备注：改图片分享自李占卫的网上家园说明： ...

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