消息队列RocketMQ版副本-阿里云

请问下，Apache RocketMQ中消费组一会在线一会不在线是怎么回事？我部署的是多组节点单副本

请问下，Apache RocketMQ中消费组一会在线一会不在线是怎么回事？我部署的是多组节点单副本模式，一个节点一直运行，另一个节点昨天停机，今天重启后就这样点刷新按钮，这些消费组就一时在线一时不在线消费者实例只有一个哦，消费组内的消费者目前都只有一个，消费的程序目前也只是单程序运行，...

rocketmq的controller是通过什么确定有几主几从的比如我有三个副本(想建立一主两从)

rocketmq的controller是通过什么确定有几主几从的比如我有三个副本(想建立一主两从) 它怎么区分而不是给我建成三个主？

源码阅读技巧篇：RocketMQ DLedger 多副本即主从切换专栏回顾

RocketMQ DLedger 多副本即主从切换专栏总共包含9篇文章，时间跨度大概为2个月的时间，笔者觉得授人以鱼不如授人以渔，借以这个系列来展示该系列的创作始末，展示笔者阅读源码的技巧。首先在下决心研读 RocketMQ DLedger 多副本(主从切换)的源码之前，首先还是要通过官...

源码分析 RocketMQ DLedger 多副本即主从切换实现原理

DLedger 基于 raft 协议，故天然支持主从切换，即主节点(Leader)发生故障，会重新触发选主，在集群内再选举出新的主节点。RocketMQ 中主从同步，从节点不仅会从主节点同步数据，也会同步元数据，包含 topic 路由信息、消费进度、延迟队列处理队列、消费组订阅配置等信息。那主从切换...

基于 raft 协议的 RocketMQ DLedger 多副本日志复制设计原理

前面已经用源码的手段对 RocketMQ 日志复制的实现细节做了一个详细的介绍，可能有不少读者朋友们觉得源码阅读较为枯燥，看的有点云里雾里，本篇将首先梳理一下 RocketMQ DLedger 多副本关于日志复制的三个核心流程图，然后再思考一下在异常情况下如何保证数据一致性。1、RocketMQ D...

源码分析 RocketMQ DLedger 多副本存储实现

RocketMQ DLedger 的存储实现思路与 RocketMQ 的存储实现思路相似，本文就不再从源码角度详细剖析其实现，只是点出其实现关键点。我们不妨简单回顾一下 CommitLog 文件、ConsumeQueue 文件设计思想。其文件组成形式如下：正如上图所示，多个 commitlog 文件...

源码分析RocketMQ多副本之Leader选主

本文将按照《RocketMQ 多副本前置篇：初探raft协议》的思路来学习RocketMQ选主逻辑。首先先回顾一下关于Leader 的一些思考：节点状态需要引入3种节点状态：Follower(跟随者)、Candidate(候选者)，该状态下的节点总是会尝试发起投票，Leader(主节点)。选举计...

RocketMQ 多副本前置篇：初探raft协议

Raft协议是分布式领域解决一致性的又一著名协议，主要包含Leader选举、日志复制两个部分。温馨提示：本文根据raft官方给出的raft动画进行学习，其动画展示地址：http://thesecretlivesofdata.com/raft/本文的截图都来源于官网的动画，如果有涉及侵权，请联系作者将...

RocketMQ DLedger 多副本日志复制实现要点如何理解？

RocketMQ DLedger 多副本日志如何理解？

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更新时间 2023-06-12 09:22:35

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