云消息队列 MQ开源项目的相关内容

我的mqtt协议和emqttd开源项目个人理解（11） - EMQ 一个客户链接的资源消耗

Erlang进程消耗EMQ对客户端链接使用链接进程(emqtt_client)和session进程(emqtt_session)分开的策略。当一个mqtt的客户端连接到EMQ的服务器上的时候，首先会建立一个负责管理连接的进程(emqtt_client)，当验证客户端有效后会建立另一个进程(emqt...

我的mqtt协议和emqttd开源项目个人理解（10） - 建立高可用集群，负载均衡haproxy

方案1：Nginx+Keepalived+emq+MySQL双机热备，MySQL用于数据持久化方案2（推荐）：HAProxy+Keepalived+emq+MySQL双机热备方案3：HAProxy+confd+emq+etcd问：...

RocketMQ 5.0学习资料

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带您快速了解阿里云消息队列RocketMQ 5.0版

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我的mqtt协议和emqttd开源项目个人理解（9） - 集群和Mnesia源码分析

学习mqtt协议和emqttd开源项目http://emqtt.com/emqttd源码版本号是v1.1.3。http://emqtt.com/downloads/1113一、先来看EMQ的文档定义：http://emqtt.com/docs/v1/cluster.htmlemqttd集群设置管理¶...

我的mqtt协议和emqttd开源项目个人理解（8） - 客户端subscribe消息的源码分析

学习mqtt协议和emqttd开源项目http://emqtt.com/emqttd源码版本号是v1.1.3。http://emqtt.com/downloads/1113源码写得比较绕，需要经过以下模块的调用，入口是emqttd_client模块，handle_info函数负责接收socket的数...

我的mqtt协议和emqttd开源项目个人理解（7） - Qos==2是如何保证消息只收到一次的

只有QoS==1,2时候，才有Store(Msg)之说；QoS==0时没有。我们以第一种action为例（注意这里第一种action存储的是message，第二种action存储的是message ID）：1 若client没收到来自sever的pubcomp：那么c...

我的mqtt协议和emqttd开源项目个人理解（6） - 使用Wireshark分析mqtt协议

固定报头(Fixed header)可变报头(Variable header)报文有效载荷(Payload)固定报头Bit 7 6 5 4 3 2 1 0byte1 MQTT Packet type Flagsbyte2… Remaining Length报文类型类型名称类型值报文说明CONNE...

我的mqtt协议和emqttd开源项目个人理解（5） - hook的使用，源码分析

学习mqtt协议和emqttd开源项目http://emqtt.com/emqttd源码版本号是v1.1.3。http://emqtt.com/downloads/11131、-module(emqttd_app).start(_StartType, _StartArgs) -> load_a...

我的mqtt协议和emqttd开源项目个人理解（4） - 客户端CleanSession=0时，上线接收离线消息，源码分析

学习mqtt协议和emqttd开源项目http://emqtt.com/emqttd源码版本号是v1.1.3。http://emqtt.com/downloads/11131、-module(emqttd_client).[html] view plain copy handle_info({ine...

我的mqtt协议和emqttd开源项目个人理解（3） - 客户端publish消息QoS==0的源码分析

我的mqtt协议和emqttd开源项目个人理解（2） - 订阅$SYS主题，捕获客户端上下线消息

1、acl.config文件定义了可订阅$SYS主题的权限。{allow, {user, "dashboard"}, subscribe, ["$SYS/#"]}. {allow, {ipaddr, "127.0.0.1"}, pubsub, ["$SYS/#", "#"]}. %%%{deny, ...

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