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- Why is Redis so fast using single thread?
- Why does Redis use single thread? Under normal circumstances, after using multi-threading, if there is no good system design, the overhead of multi-threading is actually as shown in the figure on the right (note the ordinate). When you first increase the number of threads, the system throughput rate will increase. When you further increase the number of threads, the system throughput rate will increase slowly or even decrease. The key bottleneck is that there are usually shared resources in the system that are accessed by multiple threads at the same time. In order to ensure the correctness of the shared resources, additional mechanisms are needed to ensure thread safety, such as locking, which will bring additional overhead. For example, take the most commonly used List type as an example. Assume that Redis adopts a multi-thread design and there are two threads A and B doing LPUSH and LPU on the List respectively.
- Redis 1863 2023-05-26 09:56:06
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- How to build a redis three-master and three-slave cluster with docker
- 1. Prepare the redis image and container 1.1. Download redis6.0.8dockerpullredis:6.0.81.2 Prepare 6 server configuration files #redis configuration is placed at the end of the article mkdir-p/usr/local/repository/redis/redis-node-1#Configuration reference At the end of the article vim/usr/local/repository/redis/redis-node-1/redis.confcd/usr/local/repository/redis#Copy the other 5 copies in sequence cp-rredis-node-1/./redi
- Redis 1244 2023-05-26 09:47:58
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- How SpringBoot implements redis cache menu list
- Because the system's menu list is not easily changed, there is no need to query the database every time it is requested. Therefore, when the menu list is requested for the first time based on the user ID, the menu list data can be cached in redis Here, when requesting the menu list for the second time, you can directly obtain the data from the redis cache, thereby reducing operations on the database and improving performance! First, we need to download redis locally, then open the src directory of redis in the cmd terminal, and then run redis-server to start the redis local service (mac). After opening the redis service, we must configure the relevant redis in the project Code, first in pom.xml
- Redis 1734 2023-05-26 09:43:00
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- What are redis serialization and various serialization situations?
- Serialization basically uses jdk serialization by default, which will cause string escaping. In actual development, when we want to store objects in redis, we must serialize them. Of course, if we convert the object into a json string, what is stored is equivalent to a string. Not serializing does not affect normal operation. However, we usually have to serialize the objects we create. If we don't serialize, we may use json to convert the stored objects in actual development, and we don't want to use jdk serialization yet (the default is jdk serialization). At this point we need to use the configuration class. We create a redisTemplate object to overwrite the original redistemplate object in the bean container. Serialization
- Redis 1662 2023-05-26 09:40:18
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- Application examples of Redis in recommendation systems
- Application examples of Redis in recommendation systems With the development of the Internet and the explosive growth of information, information overload has become a major problem affecting people's access to information. Therefore, the recommendation system emerged as the times require. It can predict user behavior through algorithms and provide personalized recommendation services, which greatly improves user experience and product profits. The implementation of the recommendation system requires a large amount of data storage, processing and calculation, and Redis is an excellent solution. Redis is a high-performance NoSQL database,
- Redis 1993 2023-05-12 11:21:06
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- Redis methods and application examples for implementing distributed management locks
- Redis' method and application examples for implementing distributed management locks. With the rapid development of network applications, distributed systems have become an important part of modern applications. However, in a distributed system, due to the operations involving multiple nodes, competition and deadlock problems are prone to occur when resources are shared between processes. In order to solve these problems, distributed management locks came into being. Distributed lock refers to a mechanism for controlling access to shared resources in a distributed system. It can ensure that only one process of multiple processes can operate on shared resources at the same time.
- Redis 1019 2023-05-12 08:27:05
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- Application examples of Redis in machine learning and artificial intelligence
- In recent years, machine learning and artificial intelligence technologies have been widely used in various fields. Among them, data processing is the core part in the fields of machine learning and artificial intelligence. As a high-performance in-memory database, Redis is gradually becoming one of the data processing frameworks in the fields of machine learning and artificial intelligence. This article will analyze the application examples of Redis in machine learning and artificial intelligence. 1. Redis and machine learning 1. Optimizing machine learning algorithms based on Redis caching mechanism. During the execution of machine learning algorithms, it is often necessary to
- Redis 1502 2023-05-11 23:31:36
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- Analysis and application of Redis network IO model
- Redis is an open source, high-performance key-value storage system that is widely used in big data, architecture design and other fields. Its efficient network IO model is an important foundation for its rapid response to requests. This article will introduce the network IO model of Redis and its implementation principles, and discuss its optimization methods in practical applications. 1. Redis network IO model Redis network IO model chooses a combination of single thread and multiplexing. The basic process is as follows: Redis first creates a listening sock through the socket function
- Redis 1292 2023-05-11 20:51:08
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- Application examples of Redis in reliable transmission and storage
- Application examples of Redis in reliable transmission and storage Redis (RemoteDictionaryServer) is a popular in-memory database that is widely used in network applications to improve performance and reliability. Redis is not only suitable for non-relational data storage, but also for reliable transmission and storage. In this article, we will explore the application examples of Redis in reliable transmission and storage. Reliable transmission Reliable transmission refers to ensuring that data is orderly, non-duplicated, and seamless during network transmission.
- Redis 1570 2023-05-11 19:21:14
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- The principle and implementation method of distributed locks implemented by Redis
- With the popularity of distributed systems, distributed locks are becoming more and more important. Distributed lock is a mechanism that ensures that only one process or thread can operate at the same time in a distributed system. Distributed locks are a very common problem in many applications in distributed environments. Redis is a high-performance in-memory database that supports multiple data structures and is widely used in distributed locks. This article will introduce the principle and implementation method of distributed locks implemented by Redis. 1. The principle of Redis implementing distributed locks in distributed systems
- Redis 2878 2023-05-11 19:21:08
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- Lua script writing and application for Redis
- Redis is an open source key-value pair storage database, and Lua script is a very powerful programming tool in Redis. Lua is a lightweight, efficient scripting language that can be used as an extension language for the Redis server. This article will introduce the writing, calling methods and practical applications of Lua scripts in Redis. 1. Lua scripting in Redis 1.1 Introduction to Lua scripting language Lua script, as a lightweight language, has a very small set of specific syntax, dynamically typed language and good
- Redis 2309 2023-05-11 17:17:09
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- Redis methods and application examples for implementing distributed queues
- As a high-performance in-memory database, Redis is widely used in distributed systems. Among them, as one of the important components of distributed systems, distributed queues are undoubtedly very important. This article will focus on the distributed characteristics of Redis and introduce the methods and application examples of Redis to implement distributed queues. 1. Redis distributed features As an in-memory database, Redis has excellent performance in caching, persistence and other aspects. In distributed systems, Redis also has a very prominent feature, that is, Re
- Redis 1731 2023-05-11 17:14:09
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- Application examples of Redis in data statistics and analysis
- With the advent of the Internet and big data era, data statistics and analysis have become increasingly important. As an efficient and commonly used in-memory database, Redis is also widely used in the field of data statistics and analysis. This article will introduce the application examples of Redis in data statistics and analysis. 1. Quick statistics In data statistics, it is usually necessary to count and record user behavior in real time, such as website visits, user clicks, search keywords, etc. The amount of data is huge and needs to be processed in real time, so using Redis is very suitable.
- Redis 1219 2023-05-11 17:12:28
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- Redis methods and application examples for implementing message queues
- With the rapid development of the Internet, message queues are not only widely used in enterprise-level applications, but also gradually become popular in small projects and personal development. As a high-performance, in-memory database, Redis also provides a reliable and flexible message queue solution. This article will introduce how Redis implements message queues, as well as application examples. 1. Implementation method of Redis message queue RedisListRedisList is a data structure based on linked list and is the core part of Redis message queue.
- Redis 1857 2023-05-11 17:12:22
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- Redis methods and application examples for implementing distributed network and security
- Redis is a high-performance open source memory data storage system that is widely used in distributed systems. Redis supports multiple data types, such as strings, hashes, lists, sets, ordered sets, etc., and provides a wealth of commands and functions. In terms of distributed network and security, Redis also has good support and applications. This article will introduce the methods and application examples of Redis in distributed networks and security. 1. Redis implements distributed network Redis cluster Redis cluster is a Redis distributed network
- Redis 1613 2023-05-11 17:06:18
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