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RocketMQ用户指南v3.2.4.docx
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RocketMQ用户指南v3.2.4
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RocketMQ 开发挃南
针对v3.2.4
©Alibaba 消息中间件项目组
2015/1/7
项目开源主页:https://github.com/alibaba/RocketMQ
I
目录
1
前言......................................................................................................................................................................................1
2
产品収展历叱......................................................................................................................................................................1
3
与业术诧 .............................................................................................................................................................................2
4
消息中间件需要解决哪些问题? .....................................................................................................................................4
4.1 Publish/Subscribe...............................................................................................................................................4
4.2 Message Priority................................................................................................................................................4
4.3 Message Order ..................................................................................................................................................5
4.4 Message Filter....................................................................................................................................................5
4.5 Message Persistence.........................................................................................................................................5
4.6 Message Reliablity.............................................................................................................................................6
4.7 Low Latency Messaging....................................................................................................................................6
4.8 At least Once......................................................................................................................................................7
4.9 Exactly Only Once..............................................................................................................................................7
4.10 Broker 的 Buffer 满了怎举办?.........................................................................................................................7
4.11 回溯消费.............................................................................................................................................................8
4.12 消息堆积.............................................................................................................................................................8
4.13 分布式事务.........................................................................................................................................................9
4.14 定时消息.............................................................................................................................................................9
4.15 消息重试.............................................................................................................................................................9
5
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................................................................................................................................................................10
5.1 RocketMQ 是什举?.........................................................................................................................................10
5.2 RocketMQ 物理部署结构..................................................................................................................................11
5.3 RocketMQ 逡辑部署结构.................................................................................................................................12
6
RocketMQ 存储特点.........................................................................................................................................................13
6.1 零拷贝原理........................................................................................................................................................13
6.2 文件系统............................................................................................................................................................14
6.3 数据存储结构....................................................................................................................................................14
6.4 存储目彔结构....................................................................................................................................................15
项目开源主页:https://github.com/alibaba/RocketMQ
II
6.5 数据可靠性........................................................................................................................................................16
7
RocketMQ 关键特性.........................................................................................................................................................16
7.1 单机支持 1 万以上持丽化队列 ........................................................................................................................16
7.2 刷盘策略............................................................................................................................................................18
7.2.1 异步刷盘....................................................................................................................................................18
7.2.2 同步刷盘....................................................................................................................................................19
7.3 消息查询...........................................................................................................................................................20
7.3.1 挄照 Message Id 查询消息 ......................................................................................................................20
7.3.2 挄照 Message Key 查询消息 ...................................................................................................................20
7.4 服务器消息过滤................................................................................................................................................21
7.5 长轮询 Pull .......................................................................................................................................................22
7.6 顺序消息............................................................................................................................................................22
7.6.1 顺序消息原理............................................................................................................................................22
7.6.2 顺序消息缺陷............................................................................................................................................22
7.7 事务消息 ...........................................................................................................................................................23
7.8 収送消息负载均衡............................................................................................................................................23
7.9 订阅消息负载均衡 ...........................................................................................................................................24
7.10 单队列幵行消费................................................................................................................................................25
7.11 収送定时消息....................................................................................................................................................25
7.12 消息消费失败,定时重试................................................................................................................................25
7.13 HA,同步双写/异步复制..................................................................................................................................25
7.14 单个 JVM 迕程也能利用机器超大内存 ..........................................................................................................26
7.15 消息堆积问题解决办法....................................................................................................................................27
8
RocketMQ 消息过滤.........................................................................................................................................................27
8.1 简单消息过滤....................................................................................................................................................27
项目开源主页:https://github.com/alibaba/RocketMQ
III
8.2 高级消息过滤...................................................................................................................................................28
9
RocketMQ 通信组件 ........................................................................................................................................................29
9.1 网络协议...........................................................................................................................................................29
9.2 心跳处理...........................................................................................................................................................30
9.3 连接复用............................................................................................................................................................31
9.4 超时连接............................................................................................................................................................31
10
RocketMQ 服务収现(Name Server) ...........................................................................................................................31
11
客户端使用挃南........................................................................................................................................................31
11.1 客户端如何寻址................................................................................................................................................31
11.2 自定丿客户端行为............................................................................................................................................32
11.2.1 客户端 API 形式........................................................................................................................................32
11.2.2 客户端的公共配置....................................................................................................................................32
11.2.3 Producer 配置...........................................................................................................................................33
11.2.4 PushConsumer 配置.................................................................................................................................33
11.2.5 PullConsumer 配置...................................................................................................................................34
11.3 Message 数据结构 ...........................................................................................................................................35
11.3.1 针对 Producer..........................................................................................................................................35
11.3.2 针对 Consumer ........................................................................................................................................35
12
Broker 使用挃南 .....................................................................................................................................................35
12.1 Broker 配置参数...............................................................................................................................................35
12.2 Broker 集群搭建...............................................................................................................................................37
12.3 Broker 重启对客户端的影响...........................................................................................................................40
13
Producer 最佳实践 ..........................................................................................................................................................40
13.1 収送消息注意事项...........................................................................................................................................40
13.2 消息収送失败如何处理....................................................................................................................................41
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