Redis核心解读系列
本文内容来自@麦子迈 同学的系列文章，本系列文章旨在对 Redis 内部实现进行全方位的深入剖析，与huangz同学的源码解读系统各有千秋。推荐给各位对Redis内部实现感兴趣的朋友。 （PS：作者的其它文章也很值得一读） Redis是知名的键值数据库，它广泛用于缓存
本文内容来自@麦子迈 同学的系列文章，本系列文章旨在对Redis内部实现进行全方位的深入剖析，与huangz同学的源码解读系统各有千秋。推荐给各位对Redis内部实现感兴趣的朋友。
（PS：作者的其它文章也很值得一读）
Redis是知名的键值数据库，它广泛用于缓存系统。关于Redis的信息已经不用我多介绍了。这个系统的Redis文章主要从另外一个角度关注，Redis作为一个开源项目，短短2W行代码包含了一个健壮的服务器端软件的必需，我们从Redis中可以学习C语言项目的编程风格、范式，学习类Unix下的系统编程，还有对于一个常驻服务的健壮性考虑等等。
对于一个C语言的初学者来说，学习一个类似Redis这样不大不小的项目是非常好的选择。Redis既没有Nginx深入性能细节的晦涩编码方式，又具备了一个性能敏感应用的C项目编程方式，是一个非常适合入门的项目。
Redis核心解读系统来自于本人对于Redis的学习和总结，不同于Redis 设计与实现(对于这本书的作者表示非常佩服，能写出如此漂亮，详细的Redis解读)这个Redis代码注释方式+详细解读，本系列主要是选取精彩代码和关键路径进行解读，带领进入Redis的核心内容。并且会着重介绍Redis实现上的Hack写法。另外，本人对于Redis的某些设计也有独特见解，特别是对Redis的集群分发管理上，见相关文章。
Redis核心解读系列主要有以下内容:
- 解读Redis
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ae事件驱动库
- 解读Redis dict核心数据结构
- 解读Redis中ziplist、zipmap、intset实现细节
- 解读Redis运行核心循环过程
- Redis核心解读-从Master到Slave的Replicantion
- Redis核心解读–类型系统解构
- Redis核心解读–数据持久化过程与RDB文件
- Redis核心解读–AOF与REWRITE机制
- Redis核心解读–Slow Log
- Redis核心解读–事务(Multi和CAS)的实现
- Redis核心解读–pubsub(发布者-订阅者模式)的实现
- Redis核心解读–集群管理工具(Redis-sentinel)
- Redis集群的讨论及WheatRedis说明
原文地址：Redis核心解读系列, 感谢原作者分享。
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How to build the redis cluster mode
Apr 10, 2025 pm 10:15 PM
Redis cluster mode deploys Redis instances to multiple servers through sharding, improving scalability and availability. The construction steps are as follows: Create odd Redis instances with different ports; Create 3 sentinel instances, monitor Redis instances and failover; configure sentinel configuration files, add monitoring Redis instance information and failover settings; configure Redis instance configuration files, enable cluster mode and specify the cluster information file path; create nodes.conf file, containing information of each Redis instance; start the cluster, execute the create command to create a cluster and specify the number of replicas; log in to the cluster to execute the CLUSTER INFO command to verify the cluster status; make
How to clear redis data
Apr 10, 2025 pm 10:06 PM
How to clear Redis data: Use the FLUSHALL command to clear all key values. Use the FLUSHDB command to clear the key value of the currently selected database. Use SELECT to switch databases, and then use FLUSHDB to clear multiple databases. Use the DEL command to delete a specific key. Use the redis-cli tool to clear the data.
How to use the redis command
Apr 10, 2025 pm 08:45 PM
Using the Redis directive requires the following steps: Open the Redis client. Enter the command (verb key value). Provides the required parameters (varies from instruction to instruction). Press Enter to execute the command. Redis returns a response indicating the result of the operation (usually OK or -ERR).
How to read redis queue
Apr 10, 2025 pm 10:12 PM
To read a queue from Redis, you need to get the queue name, read the elements using the LPOP command, and process the empty queue. The specific steps are as follows: Get the queue name: name it with the prefix of "queue:" such as "queue:my-queue". Use the LPOP command: Eject the element from the head of the queue and return its value, such as LPOP queue:my-queue. Processing empty queues: If the queue is empty, LPOP returns nil, and you can check whether the queue exists before reading the element.
How to use redis lock
Apr 10, 2025 pm 08:39 PM
Using Redis to lock operations requires obtaining the lock through the SETNX command, and then using the EXPIRE command to set the expiration time. The specific steps are: (1) Use the SETNX command to try to set a key-value pair; (2) Use the EXPIRE command to set the expiration time for the lock; (3) Use the DEL command to delete the lock when the lock is no longer needed.
How to implement the underlying redis
Apr 10, 2025 pm 07:21 PM
Redis uses hash tables to store data and supports data structures such as strings, lists, hash tables, collections and ordered collections. Redis persists data through snapshots (RDB) and append write-only (AOF) mechanisms. Redis uses master-slave replication to improve data availability. Redis uses a single-threaded event loop to handle connections and commands to ensure data atomicity and consistency. Redis sets the expiration time for the key and uses the lazy delete mechanism to delete the expiration key.
How to read the source code of redis
Apr 10, 2025 pm 08:27 PM
The best way to understand Redis source code is to go step by step: get familiar with the basics of Redis. Select a specific module or function as the starting point. Start with the entry point of the module or function and view the code line by line. View the code through the function call chain. Be familiar with the underlying data structures used by Redis. Identify the algorithm used by Redis.
How to make message middleware for redis
Apr 10, 2025 pm 07:51 PM
Redis, as a message middleware, supports production-consumption models, can persist messages and ensure reliable delivery. Using Redis as the message middleware enables low latency, reliable and scalable messaging.
